I use it regularly. I find it best to use if you are willing/able to futz around with the xml templates.
What exactly are you trying to use it for? I track initiative, hp, and power usage, but it took a little bit to familiarize myself enough to make a 'system'. I can go into more detail, if you like.
EDIT: [MENTION=6688865]LeStew[/MENTION]
I guess that's part of my conundrum. Aside from tracking imitative, and HP, why use it? I mean cuz I could that on paper....