I am very impressed, I have yet to find any bad thing about it (other than its price tag). It works very well, is easy to set up and it has a lot of parameters to play with. But even at stock settings it works fantastically well.
I couldn’t keep myself from building a custom retention system for it. It is a simple aluminum plate and ring that attaches directly to one of my Losmandy G11 HD tripod leg. If anyone is interested I will post the drawing details in the G11 category of this website.