My sample of 4 swaros, ( 1 AV and 3 Z 3's) has been problem free. I've a couple respected friends who've had issues with theirs, but for me and many others they've been a great scope.
My 7 3/4 lbs. 300 H&H has got some snap to it, but with 500+ rounds behind it the swaro has been fine; although I'll admit once I've got my load developed I'm not playing with the adjustments like other folks, I pretty much just practice then go huntin'