The internal hardware setup was a pain, especially the way the riser cards were positioned. The organization of files on the setup disks tended to be annoying. Most users would have a hard time pulling out drivers if they upgraded the OS to a newer version. The bundled software was also annoying, but that is similar to many other vendors. Navigator could have been an interesting environment, but didn't quite make it.

As to hardware failure, I can't say I personally experienced it, nor did I ever deal with PB directly for support. Using their website was a major pain, though. Especially after they fled the States.