Have You Tried Woopra? Analytics Software

Some of you probably haven't heard of Woopra. First of all I am not a salesman for them or anything, not even an affiliate, I just like the software. It's actually pretty amazing. It is similar to google analytics in the fact that it is a web site tracking or analytics program. But it offers quite a few perks that aren't available with google. Perks like seeing exactly who is live on your web site in real time, and being able to initiate a chat with that user if you want. Anyway, here is a video regarding woopra that shows some of the basic functions and features.
http://www.youtube.com/watch?v=ucW2V1n2LQE
It is free, they do offer a paid version for those of you getting thousands of uniques daily though I believe. You can view your stats online similar to google, or actually download a client to your machine, which is awesome.

Are any of you using Woopra? Thoughts?