I loved my Memory Maker Experience!
This past September was my first attempt at Memory Maker, mostly because I wanted some decent cheesy picks of my partner and I on one of our last visits for a few years. If you visit the parks sparingly, then I'd highly recommend it, especially if you are attending during a separate ticket event, i.e. : Mickey's Not So Scary Halloween Party or Mickey's Very Merry Christmas Party. The CM would scan my MagicBand and almost immediately we could look at the photos on the My Disney Experience app and even save it to my phone's camera roll so I could post it online or send it to family. To get your money's worth, make sure you stop as often as you can at as many photographer locations you can find (they should be on the MDE app), even the unlikely spots, like the areas around the World Showcase that aren't with a view of Spaceship Earth dome or the fountains (although, they're really beautiful pictures). Also, if you're as picky as I am about angles and getting a "good" photo, you're much more likely to get the perfect shot eventually! I have 188 photos, including the attraction photos, from my trip that I downloaded. I wouldn't have them printed from Disney directly but I will eventually bring them to CVS or Walgreens to be printed.
So in closing : It's absolutely worth it if you are celebrating a special occasion while on your trip, or there's a special ticketed event you are attending, or if you don't visit the parks very often and would like some nice professional photos (as opposed to your amateur-at-best iPhone photos - depending on your photo-taking talent). Just beware of taking photos during the evening. I have plenty of nighttime photos and only one or two that actually came out nice. The others are very blurry since they had to set a long exposure time. The best photos are during sunset, AKA the golden hour for photo lighting.