I've had one of the SS10x42 (rear focus) models for about 4 years now. No problems at all. Tank tough little scope. Had it on a Rem 700 VS in .223 as a coyote/prairie dog rifle, and it got taken in and out of trucks a *lot* during that time (and subsequently bumped, jarred, and dropped). Recently I've had it on my Rem 700 VS in .308 Win, and I've shot some of the smallest groups I've ever shot using that scope.
I've heard less-than-good rumblings about the side-focus model (SS10x42M). IIRC, there is a fellow in Canada who shoots in a competition, either sniper-style or F-Class, and wins pretty consistently w/ a SS16x42, from what I hear.
Monte