Virtualization software

[Kenneth P. Turvey]

I need to run Windows (XP or Vista) for some clients I have and I would
like to run it in a window like I used to using VMWare.  It has been a few
years since I needed Windows for anything so I thought I would check in
and find out what the best way to do this is today.  VMWare used to be the
only software that would do this well, but now I understand that there are
a number of options. 

So which is best?  Free options are obviously better.  What are the pluses
and minuses of those options?  

What kind of virtualization software are you running?  What do you like
about it?  What don't you like about it? 

Thanks. 

-- 
Kenneth P. Turvey <kt-usenet at squeakydolphin.com>