Here is the apartment demo if anyone else wants to try it, it doesn't need rift
https://mega.co.nz/#!nIJSmT6K!BRKQBDb0uB9V9Xbtz13c_3QZjokq_3jICCOdoAbCZtw
Controlling in the rift is the same as controlling without it, with wasd or xbox controller. The only exception is panning the view up and down is disabled as you can do that with your head. You can even stand and walk around a bit and the positional camera will track your location, you are limited however by the range of the camera. Upcoming things like the omni treadmill will allow real stationary walking, but i might skip the bulky first gen versions of such devices.
I can play for 2 hours perfectly fine in most compatible apps. Dying Light is the first game to make me sick however, and I need to take breaks every 30 mins. However its rift implementation is very incomplete, so I try to avoid looking around with my head too much, and I close my eyes during the cutscenes and crazy acrobatics lol