I'm trying it out right now and so far I really like it, BUT my cabinet needs to run at a lower resolution than 640X480, so when using Maximus I tend to get a flicker, which eventually gives me a headache. I was told that future updates will allow custom resolutions, but as someone else mentioned, it takes forever for updates to come out.
All in all, it's very nicely done. Try the 30 day trial to see if you like it.