Got to use the HTC the other day...
Impressed: Its speed, motion control reaction etc. After a moment and I got into things it felt natural - but count me in the camp that I would rather sit in a 360 rotating chair than wonder around and shuffle a few steps one way or the other.
Not Impressed: field of view - very circular edges and it didn't seem "that much more" than my stupid phone in a 25$ ebay vr headset... and Resolution: I could see pixles easy, their non standard arrangement (or lenses distortion) was very distracting and again, didn't seem that much better than my phone lol -also my glasses did not fir well what so ever and it was not good.
Looking forward to trying the the rift, its suppose to be higher resolution and fov than the HTC right?