Haven't tried it, but $39 for the personal version ain't bad. It
seems to include some PIC emulators, which takes it a step beyond
typical SPICE programs.
If you don't need the PIC emulation, then I recommend LTSpice which is
reasonably fast, easy to use, and free (as in "free beer").
http://www.linear.com/designtools/softwareRegistration.jsp . There is
a very active user group at http://groups.yahoo.com/group/LTspice .
Cheers,
- Jan