Here's my quote from the official explorer thread:
"When I drop my arms to rest a bit, one of my controller disappears and I have to wait 15 seconds for it to reappear. And my center finger hurts after 15 minutes of play to hold a gun in a shooter. We must exert too much pressure on the trigger to keep the gun in hand. And when you aim for something without moving, there is always a small frustrating movement. Can not focus on a point without always having to correct our target. When I return with my Oculus rift and touch with my 3 sensors, all is really smoother. I do not need more, I return this product to microsoft ASAP!"