We had a blast with our Genie Jay on Anthem in January 2019. Reserved seats front and center- being wisked through back hallways around the ship if/when we wanted or needed to get somewhere quick. Never waiting for an elevator- they have a call button. More food and drinks brought to the room than we could eat/drink. (Ok- caught me- more food than we could eat). Never waiting in any line anywhere for anything. It was great. Once.
My wife and I are very low key, simple people. We're on vacation- so what really is "needed"? We like lounging around the pool, visiting the bars, and just enjoying being on the water. So- we've decided that it wasn't worth it (even with the tremendous deal we snagged)- compared to what we really got out of it, Genie wise. If you can find a deal and grab one- sure- experience it and see. For us- loved the 2 story suite AFT more than anything.