I've been running it for ages (at least since 1996 or so I think) and I'm currently running version 1.32 (it's old, I know, but it works very well) on my A1200/060. I've never had any stability issues with it and I must say it is THE best multi-purpose system patcher/improver. Instead of having like 20 start-up patches and hacks with MCP I maybe have 5 :-)