Hey man, I am probably not the best person to do a review on getting it working and such. I only have DK1 at the moment with DK2 in its way.
For assetto corsa, dk1 is pretty much plug and play. Initially at the 1200x800 resolution it was pretty much unplayable. I cranked the resolution up to 1080p and it made it perfectly playable.
I am one of the types that can look past dk1 shortcomings so assetto in VR prior to this update was amazing for me. It completely killed monitor racing for me. The sense of being in the car is crazy good. I became faster in the rift than on a monitor.
Since the latest update though, VR support has become completely broken. The sense of scale is way off, the car looks massive. The steering wheel looks about 1 meter in diameter. Prior to the update though, scale was spot on.
If you have cash at your disposal, get a rift. It is made for driving. Be be aware of the screen door effect, and the fact that it takes am hour or two to get used to it. If you can lookpadt the shortcomings , you won't be dissapointed.