I've got a couple A-Bolts and I like them a lot. After about 16 years and 2000+ rounds, my Composite Stalker still shoots like this on occasion:
My best group of the weekend, about 1.42". They aren't perfect, though. One thing that has bothered me (unless Browning has improved the synthetic stock over the years) is how flexible the forend of the stock is. I'm waiting on a McMillan but in the meantime I bedded a steel bar in the forend just for the hell of it. I really like the improvement. And my trigger was never that good (apparently they're better on the newer rifles) so I replaced it.
Other than that, I can't complain. I can't wait to get the new stock...then a new tube for next season.