I do use it, and am very happy with it. It uses hard links, so it saves disk space and it's easy to configure. Apart from that, it wraps around rsync, as I mentioned above, so you can pass on rsync...
Rsync is an excellent tool for incremental backups. There are many good tutorials out there, and, of course man pages.
rsnapshot is great for doing snapshots (e.g. hourly, daily and monthly). It...