I own a I and several II's. I do like them, although I've heard both good and bad about them over the years. Push feed Vs CRF aside, seems that people either like them or don't with relatively little indifference in the middle.
I've never had one fail, and they all are typically very accurate. I like the 60 degree bolt lift which makes cycling the action much smoother with a scoped rifle. I like the trigger right out of the box, although I have it adjusted down to 2.5-3.0. The extractor is way stronger than a 700, although Sako style rules in my opinion. The palm swell on the synthetic stalker is a nice touch. I like the hinged floor plate and detachable magazine, which allows easy placement of an extra round after chambering. The safety is reliable, locks the bolt when engaged, and I 've never heard of a malfunction.
I don't like the complexity of the bolt. Disassembly is more a chore with this one than others. The bolt sleeve on the A-Bolt II is also a major hassel when cleaning after returning from the field. However, those are my only real beefs. I admit to these short-comings, but I still like and even prefer A-Bolts to some other rifles.
So what else makes them so disliked by some?