I've typically gone to Alamo Drafthouse. It's a somewhat upscale theater chain if you're not familiar. Pairs of seats share little tables, you buy a ticket for a specific seat, and they serve meals and drinks during the film.
When MoviePass came out I doubted they'd include Alamo but looked anyway. The local Alamo did indeed show up among the MoviePass theaters so I signed up.
When I tried to use it, I checked in advance because I've learned that the good seats get reserved early so unless it's a mostly empty showing, getting a ticket at the last minute can relegate you to the eyestrain seats in the very front couple rows.
The app said I could only get a ticket if I was geographically close to the theater. I can't reserve good seats well in advance. In fact I can't even head to the theater knowing I have tickets. I have to go there first hoping that a) I can get tickets and b) hoping I can get good tickets.
The idea being, I guess, that MoviePass' arrangement with Alamo is purely about helping Alamo fill any seats that may still be unsold when the movie is about to start. And then maybe Alamo can sell those people some food and drinks.
This might work for someone who will stop by a theater often, has flexible plans, and sees a lot of less popular showings. It's a total non-starter for someone like me who goes only occasionally to mostly highly anticipated films and always as a date with a significant other who cares a lot about having a plan in place and getting good seats.
Oh well, what did I expect. It's a cheap monthly subscription.
But the final frustration was trying to quit. I recall the app making this rather difficult and non-intuitive, and then warning that if I quit I wasn't going to be permitted to sign up again.