I have used it. Can't really comment on whether or not it'd suit you unless you let me know what you want to do with it.
I personally did not like it for a few reasons:
1. Wasn't an email server - I wanted to host my own mail server. It's perfectly straight forward to do this on WHS but it's not a built in feature.
2. Can't share a NAS drive. I have all my files/music etc on a NAS drive on my network. I want to keep it that way, however I wanted to be able to share this as well, via WHS. Couldn't be done.
3. To get the most out of it, you need to (if I remember correctly) set up user accounts and then use those instead of the ones currently set up. I didn't really try this as the first 2 points made me stop.
Hope that helps somewhat.