In comparison to my Noveske and friends other top tier brands ATRS makes a fine product. I didn't really see any negatives, other then they can cost a tad more then your top tier big names available. Positives to that however are that you can get engraved what you want if you want to personalize it more, and their upper lower adjustment BB is a pretty cool feature I wish several makers would give a go at to.
Their machining is real good, honestly if thats what you like go for it, if not there are many options out there. Last ATRS I had was solid and a good shooter, I used their upper and lower and a rock creek stainless barrel, DD rails and overall it was a solid rifle.