It's definitely way easier than using Browsershots, so from a developer standpoint, it's great. It runs pretty slow on my PC though and is quite a resource hog; I blame part of that on the GUI, but I'm not really sure.

I used it all day on its release to see if I could possibly convert. Maybe after it's final release (but I hope to have an iMac by then) because it's just too buggy now.