I do not have one currently set up on any of my bows but I have used several versions in the past and have set up dozens for customers. With the new style biscuit you can generally expect moderate fletching damage until the rest is broken in and/or you trim the biscuit somewhat.

Speed loss is negligible with the 4 inch, slight offset, vanes that I have been using...approximately 1-2 fps on average.

No loss in accuracy resulted from switching back and forth from a biscuit....and I must say that it is an extremely quiet rest at least when used with carbons.

Hope this helps.