I used it on an old potato chip of a Pentium 4 (this was nearly 20 years ago). It took days to compile what I wanted, which was a basic system plus KDE. I don't know what was going through my 17 year old brain. But hey, it walked me through some details of a Linux system that I wouldn't have encountered otherwise. Now I would recommend Linux From Scratch for learning and a nice, stable distro with a large, supportive community for a daily driver.