I contracted with a flooring store that owned one of those things and I was intrigued by the concept. Never used it on a job but did borrow it for a weekend or two just to play with.
It was fun but I would never buy one for professional use. The ring-blade is driven by a series of rubberized rollers that are mounted in an arc. The top is the same way. You are limited in what you can do because the tile will run into the backside of the blade just when you don't want it to if the tile is too big. Some cuts are impossible to make because of this.
It's OK for little bitty tiles and semi-fine cuts but there again you are limited on how tight of a radius you can cut because the width of the blade also hangs on the tile and everything just stops.
If a guy has money to burn and wants to limit himself in his hobbying then I guess it's a fair saw to own.
Instead,
I bought a diamond band saw. Much better deal from a practical standpoint but probably more expensive. I have cut detailed oak leaves with my band saw that you would never be able to cut with the Revolution saw.

I use it from time to time for weird stuff like that.
