I use it, it'll be a year in August 2013.
Love it, no complaints at all, the reports you can pull are spectacular.
Easy to setup, easy to use, no proprietary equipment involved, I have nothing but praise for that software and the people who work there.
I am using Premium V3, I upgraded from Standard after the first few months. Not because of shortcomings in standard, but because I wanted to use all the cool features in premium.