I'm a lurker more than a poster, but thought I'd post my experience from a voyage in early May. An element of this will be how my opinion has shifted over time on the Starcruiser.
Lead up
Admittedly, I got very excited for this trip, more than normal. It was a trip where we were doing something outside of the norm, where there was a huge new thing at the end of our trip and it was going be much different than other trips where maybe we try some new restaurants or attractions but otherwise have an experience in the same ballpark as earlier WDW trips.
In the week lead up, we stayed at Bay Lake Tower (never again!) and did compromise our trip a bit to conserve energy for Starcruiser. While we had an excellent trip overall, there was a constant nervous excitement for the Starcruiser voyage at the end of our trip that took us out of the moment at WDW a bit.
Part of the nervous excitement might have been my attempt to avoid spoilers and not knowing really what to expect for 1.5 days of life. I knew there was a LARP story (and we had never LARPed before), I knew we picked sides/paths, I knew there was blue shrimp, I knew there was lightsaber training, I knew the datapad was important, I knew that there was merch (that there might be lines for), I had heard there was [a specific story piece], but that's basically all I knew.
I did try to come up with a backstory, but it was ultimately pointless. My wife is less of a fan of Star Wars and had me make a simple backstory for her; she enjoys the films and shows, but not as much as other films/shows, and generally doesn't spend any of her own time thinking about Star Wars.
Check-in
We arrived about an hour early and were able to join the second transport up to the Halcyon. Our outfits were moderately and simply themed to SW, not nearly as intricate as some of the groups ahead of us. I felt like we might be a little out of our element, but the groups behind us were generally even less themed than we were so this might have just been biased to arrival time.
The initial reveal of the lobby, especially with it being almost completely empty, was awesome.
After our transport up, we took some pictures in the Halcyon, stopped at our cabin briefly, then went straight to the store to get ahead of any lines. No lines ever appeared to materialize.
We went to Sublight lounge, which is fantastic, learned how to play Sabacc, and had a few drinks. The folks we played Sabacc with had very intricate backstories and were immediately in character. Again I felt like maybe we were out of our element and taking on more than we could chew as we didn't really know what we were doing.
The cabin
I booked a Galaxy Class Suite (the 1-bedroom variety) for my wife and me. It was only ~15% more expensive for 2x the space, so it seemed reasonable, but it didn't really add much as the bed was the same queen (which was way too soft). The biggest upgrade was the shower and the living room space. We did let our stuff/suitcases consume almost the entire living room, though, so we put the extra space to use.
I think we're split on whether we'd book the 1BR again, with my wife in favor of it and me leaning against it.
The cabin is cool and very well themed.
The story begins
Going in, I wish I had known more about how the mechanics of the story worked and how important face time was with characters. I had early, extended, incidental face time with a character on the other side, so it ultimately meant nothing. I thought more of the story would go through the datapad than what actually happened. We declared our side on the datapad early and thought the story would come flowing in, but it did not other than the basics.
I didn't have any face time with 'my' main character until well after dinner when I spotted them in the lobby and approached them. They got me setup to do more later, but until this point I felt a little lost, like I was missing something, and was honestly pretty underwhelmed. I had just been checking my datapad over and over for something new, but not much new came up.
We wandered aimlessly across the various rooms, waiting for something to happen. The key, as we know now, is talking to characters to enter story threads.
Dinner/Gaya
Gaya's performance was excellent, and the food was generally very good. We were lucky to book the captain's table ($30 extra per person) and it was borderline worth it. You get very little for the extra cost, but it also doesn't cost that much (less than Palo upcharge, for example).
Bridge training
This was excellent, a highlight.
Day 2 - Batuu
We were generally warned about making sure we were completing all tasks to get the most out of it--a big priority for us--so we went downstairs to depart to Batuu first thing that morning. We were on the 2nd transport, again, and only had to wait a few minutes once they got started.
We didn't have as much to do in Batuu as we hoped. We had a main and secondary story to pursue but still wished we had more. I think at this point we both still had the mentality of "let's have the datapad tell us what to do" that honestly probably caused us to miss some stuff because we hadn't been proactive with characters earlier.
While on Batuu, when the datapad tasks had all been completed, I realized [a specific story piece I alluded to above] was not something we were going to experience and got pretty disappointed.
Lightsaber training
I had seen the underwhelming D'Amaro video and was expecting a bad experience. It was actually pretty great!
Day 2 - Story conclusion
Fortunately I did manage to get onto the main thread of my chosen side and (I think) got the full-fat ending. The final escalation of the story was great and the overall conclusion was very good. I certainly have notes/feedback, but I'm not sure if this the time or place for them.
Day 2 - Wrap up
At this point I think both of us were really impressed, a little sad it was over, but also thinking we probably weren't ever going to do this again. It was an expensive but worthwhile one-time experience.
Day 3 - Checkout
Honestly, we had a really bad experience at checkout that almost resulted in us missing our flight. We would absolutely not ask them to hold our bags again while we went to the parks before our flights.
The month since
Our opinion has shifted from "worthwhile one-time experience" to "we want to do this again". Even my non-enthusiast wife got fully immersed and agrees; she thinks it was extremely cool.
Part of it is that it's been stuck in our minds way more than other Disney/non-Disney vacations have been in recent memory. At this point there's an itch that we think only Starcruiser can scratch. We don't feel an urgent need to scratch it, but it's there.
Part of this comes from the stuff we missed, but trying to piece things together we don't think we could have done everything we wanted to do in a single voyage, even if we knew everything in advance. So we want to experience elements we missed originally. It's fair to interpret this as a negative, but we don't see it this way. As frequent visitors to WDW, we're very used to not being able to do everything possible or even everything we want to do, and in this case we're to blame for missing out due to intentional, regrettable ignorance. I'd say it's more like wanting to play a video game again, but do things differently to have a different experience.
Part of it is that we have friends we occasionally travel with and we think they'd love it. We think it could make for a fun group trip for the 7 of us.
Overall
It's not a perfect experience, but it was incredible. It exceeded our expectations in a lot of ways and has us looking forward to this type of experience in the future.