I recently had a relatively low speed spill at TH West and got pretty bad road rash on my arm where the suit tore because of the neoprene. I've had other low speed crashes and each time the stitching comes apart and leather tears pretty good, but it's repairable. I can't imagine how poorly the leathers would hold up in a moderate or high speed crash.
So now I'm looking for the best one piece leather suit out there that money can buy. I don't care about the weight, I want the thickest leather all the way around with no neoprene anywhere.