We use SVN where I work and with the right documentation, right client and tools it is a snap - so far it is highly reliable to work with. After having spent the past 10 years with VSS I can say I don't miss it a bit.
I like SVN so much I wrote a review of what I consider to be the most valuable clients (some are not) and additional tools. This is a new article so it is very timely: http://codertools.wordpress.com/2009/03/24/svn-subversion-clients-and-other-tools/
I would not hesitate to recommend SVN to anyone - GIT is next on my list to look at..
Hope this is helpful.
