Just got mine on Thursday, but I'm loving it so far. Hope to get in some more shooting this week. It's been too dang cold to shoot outside much here lately, but sounds like 30s for a few days now so I will get some shooting in. It's hard to imagine much better draw cycle. I have rock mods, so obviously the back wall is solid. I haven't shot one with the standard mods, but I would highly recommend the rock mods.
I was initially a little worried about the 6 1/8" brace height, but it has proven to be a non issue so far. I've shot some with heavy clothes (at -1 F. heavy clothes means HEAVY clothes). I also shot indoors and have had no string slap at all.
I'll try to report more as I get more opportunities to shoot it.