In fairness, from 1996..1998 we used VSS 5.0 at DEC Commodity Graphics
for 3D device driver development, with a team of 7..11 people.  That's a
relatively small project, and we never had any problems.  I've heard
many horror stories about VSS's reliability over the years, but I
suspect these are from larger projects.  I think worrying about such
issues for a solo project is seriously overthinking the issues.  VSS
integrates very well into the Visual Studio environment.  On the other
hand, Perforce is free for a 2-user license, has equal ease of use, and
is reknowned for its robustness.  If I were still doing Visual Studio
development I'd be doing that.

As it is, I intend to try Subversion.  It's clearly better than CVS by
all accounts, although I couldn't tell you in what ways.  I'm not sure
if integration with things such as Eclipse is one of the ways.

I'm also interested in DARCS.  http://abridgegame.org/darcs/  Apparently
it can do lotsa "neato" source control things, but currently it has hard
limits on project size and can't scale past a certain number of lines of
code.  Also, Subversion has widespread support and is commonly regarded
as "the future" of open source projects after CVS.  DARCS doesn't have
the same level of tools energy and mindshare behind it, i.e. no Eclipse
plugin as far as I know.

The OP was asking about "ease of use" so I didn't recommend Subversion
or DARCS, as I haven't used them yet.  But VSS and Perforce are
perfectly reasonable options for a solo Visual Studio developer.