I've gone a handful of times since it's opened and it's a great place for Bemani.
My only gripe is with all the rhythm games grouped together it can be quite a mush of music so headphones help a lot for the games that have headphone jacks.
I mainly focus on IIDX but all of the machines seem to be well serviced.
There's also someone that's maintaining Twitch streaming on a few of the machines if anyone is interested.