I've never had one fail, but mine is pretty blah at the moment. I think I got my current one in 2009, so it's almost 9 years old.



My main problem is that I forgot to change the nib for a long time, so I scratched the surface with the sharp point enough that it started to enter and travel along those grooves and mess up every other stroke. The way I got around it was by using some large sticky vinyl covering since it can pass through it and the tablet's "paper texture" had already long since rubbed off, so having a smooth surface is no big deal. It works pretty good, but I'm also running low on not-pointy nibs, so I might one day scrape through that vinyl covering and need to add another... ;_;