Mercury Mail Server

Anyone else using Mercury? I am using for IMAP and SMTP and it seems to be working pretty good. I just wanted to know if anyone else has had good/bad luck with it. I don't want to use a MS Mail Server, but I don't really feel like learning a linux mail server either.

I'm using Mailtraq. Good solid product for Windows with added niceties like webmail functionality and built-in NTTP, mailing list, etc. support you can turn on and off as required.