Useful Subversion Documentation

I came by a blog entry at Frazzled Dad pointing to free online documentation for Subversion. I just started using Subversion for a project (I use Tortoise SVN as my client) and have mixed reviews. On the plus side, I like the fact that it is not tied to Visual Studio and the basics are simple to learn. My complaints include a couple of problems we had including our bin folders into source control that required us to rebuild the database. Fixing didn't seem to be an easy option. Though, in all fairness, maybe if I would have had this documentation, there would have been no problem. Would I recommend Subversion? if you have no source control system in place or you loathe your current system, then absolutely. If you are thrilled to pieces with the source control system that you already have, why change?