Pros: Great THIN pad. Lives up to its name. I really have noticed a different. I love that it doesn't interfere with a already all fitting saddle. I use it under the saddle pad (the way half pads were invented to be used). I love that its not sheepskin (i got the black). It has pockets for shims that allow for lots of placement options, also even though they don't mention it you can use or even make your own shims for a real custom fit.
Cons: Nothing bad to say other then it runs a *smidge* big. I have a 18.5 jump saddle and a 18.5 dressage saddle and the large is defiantly large. Honestly its probably a plus.
Comments: I have noticed a HUGE reduction in my saddle moving at all while riding (slippage wise).