Does anyone else think their Whisker Biscuit is making their groups inconsistent?
Not here. My groups are as good as they've ever been. However, it's not why a shoot one. I use it because, it's practically indestructable, reliable, durable and quiet (both on the draw and on the shot). It's great because the arrow won't fall off or make noise when the arrow gets bumped. If I need a second shot, the arrow can be loaded quickly and quietly. It does so many things well that a hunter appreciates while hunting.
Are there better rests for target shooting? Probably, but I always make my choices based on the advantages while hunting. Even if it were proven beyond doubt that is was a less forgiving rest, I would still use it and without a second thought.