I have been shooting this material for about two weeks now. I'm impressed with it thus far. For starters, zero peep rotation. I have never had rotation from a string Tom has made for me, so that is nothing new.
I haven't chronographed it yet, and I doubt I will. I want a stable string, speed is irrelevant. But, from what I have seen from some test numbers, this stuff is consistently 3-5 fps faster than Astro.
The biggest difference I have noticed from XS2 is how quiet it is. My Vantage Elite is now quieter than my Maxxis 35. This material is whisper quiet. I've never had what I would consider to be a really quiet bow, probably because I shoot 31.5" draw length. This material has changed that. XS2 feels very solid on the bow. Very tight, snappy on the shot, but still a soft and quiet shot.
I haven't had a chance to shoot it as much as I like due to being sick, but I like what I am seeing out of it thus far. I will try to get some pics up and document the wear of the material from week to week with pictures and an estimated shot count. I judge string material by feel and stability and I am pretty unbiased when it comes to manufacturer. I don't care who makes it, if it isn't performing to my expectations, I'll replace it.
All in all, I think it is a better material than Astro, Excel/452X. I think people will find a noticeable difference in the feel/sound of the bow. I don't think Brownell or BCY would introduce anything that didn't outperform their current offerings. I've had success with Astro/Excel/452X, and I'm expecting this to outperform them all.
Picked this off the other forum, looks very promising.