I dislike the ATR, simply because it ONLY comes in 270 & 30-06 - neither of those are anywhere on my 'favourite cartridges' list. I greatly prefer the feel of a short action - shorter bolt movement, usually smoother feel (due to the aforementioned short bolt movement), etc. It's purely an aesthetic/feel thing. If Mossberg/Howa made a 308 or 7mm-08, I'd be very interested in trying one. As is, I'm quite pleased with the performance of the Stevens's. They're ugly guns, no doubt about it and the injection moulded stocks leave a lot to be desired. Triggers aren't the best, but aren't BAD either. I've never had any creep issues with them, but I have with Vanguard/Howas before - not that creep is hard to correct. Stevens triggers are easy to tweak, and have a lot of adjustment. It's easy to adjust for zero overtravel (key factor in the 'crisp' feel department), and you can get them down to about 3lbs before you start getting slamfires (you can take them all the way down to a few ounces for range use, but if you slam the bolt shut too hard it'll go bang) But they work. They shoot really well, they're light, they balance well, and they have no useless extra features. They do have really s**tty recoil pads though, thin and hard as hell - with top loads my 308 was bruising me after a couple boxes of ammo at the range) Not the greatest guns in the world by any stretch, but I do believe with these guys you DO get more than you pay for.
If mossberg made 'better' (or at least more interesting) calibers, I'd certainly try one.