Hopefully they'll be better now, but they used to be a nightmare for fatigue damage and the welds failing (clicky for pictures).
They used to have a lifetime warranty, which they were happy about honouring (with the latest/nearest model if the failed frame had been discontinued), but I think it's only two years now.
I bought an original Shockwave in 2000, had four of those (all failed on the same weld), two Sins (both failed on the same welds), and two San Andreas DNAs (the second one of which I eventually gave away, only for the recipient to discover the shock mount had failed). I also had a Moho, but I didn't bother getting that warranted, cos to my surprise, the insurance covered it, so I got a Pace RC300 instead.