The app rating in Google is currently 4.5 stars. I did my part in leaving a review, and got a nice "As our features grow..." pasta reply.
Edit: I've also downgraded the app to version 4.38 and disabled auto updates (both for the app and the firmware), and asked my housemate to do the same. That should keep things working for now.
My favourite VR app is Bigscreen - your own private big-ass cinema. Ever though the resolution isn't as high as a 4k TV, it really is so much more immersive.
However my most used apps are workout games. It's much more fun than going to the gym. The pricetag is pretty steep though.