I'll count my G+ day a success. I would be surprised if anyone looks at my day and says G+ was a failure.
In 1 day at MK (sold out day in February) I used LL on: Big Thunder, Space, Pooh, Mad Tea Party, Haunted Mansion, Peter Pan, Mermaid, Buzz, Jungle Cruise, and Pirates.
I also had time to standby: People mover, Monsters inc, tea cups, big thunder, splash, pirates and got an awesome spot for fireworks (waiting a little over an hour for them).
I also watched the castle stage show, 3 cavalcades, and spent a lot of time shopping.
Was it as good as my last time using FP+ in MK? Nope back in 2019 i skipped
Splash, Thunder, Haunted Mansion, Pooh (x2), 7 dwarf, Meet tiana and Rapunzel, Meet Ariel, Mermaid, Dumbo, Tea Cups, Buzz (x2), Meet Mickey& Minnie, and meet Tinkerbell.
However, G+ worked just fine for me and I felt was worth the $15 per person.