I put Jones loop bars on my Specialized Fatboy, since flat bars give me wrist pain.

I had to use a longer stem to keep the grips in approximately the same area as with flat bars.

This bike is my main winter explorer and summer singletrack bike. It does great on singletrack. I prefer the Jones bars on my local trails, because they have a lot of saplings right near the edge of the trail. If I brush against them with flat bars, they wrench the bars and I go down. When I brush against them with Jones bars, the bars bounce off due to the swept angle and I continue down the trail. (I am a clutz).