Works for me, too. I'm more than comfortable maintaining all kinds of server side stuff, but mail is just too much for me. Spam in particular is a pain--Google's spam filters work really well, and you get a good web interface to boot.
One caveat: Yahoo! and Hotmail often block email originating from Google Apps accounts: this has happened to me (with personal emails) from two separate domains (one of them is a work one).
http://www.google.com/apps/intl/en/group/index.html