My first 15" RotaTrim was purchased in 1975. I would estimate that it has seen well in excess of 1,000,000,000 cuts since then and I still use it on a daily basis. It's not quite as square as it once was, but that's not an issue in most cases, since the the difference is minimal. Still the original blade, never been sharpened. Until about 10 years ago I had to tighten the blade/spring assembly periodically, but then I used a bit of Locktight and haven't had to tighten it again. I also have a 24" model that dates back to the early '80s and it's performing equally as well, although not used as much as the smaller one. Also a newer 15" that I use for ultra critical cuts. All in all, an excellent investment!
Gary
