There is one caveat when using SourceSafe - put the sourcesafe install on it's own partition. For some reason it is not good at estimating the free space (and therefore whether it is safe to check in a file) when it shares a logical drive with others...

Also, if you are going to use it professionally I recommend that you run the Analyze -X command at least once a week to check that the code base isn't damaged in any way.

HTH,
Duncan