Its a very nice tool. I've used it on a dozen or more builds, and I like the effect. It comes with different spaced wheels that work for most scales and applications. It leaves a nice round mark. There is a learning curve to figure out how much pressure to apply so the rivets show up enough, but too much pressure distorts them some. It does take some time to change out wheels, and you have to have a separate exacto handle to chuck it in if you use it alot. Its really easy to use and to make straight lines. I mark a line with a pencil and follow it. An alternative would be Trumpeters rivet tool. It has a plastic handle and can quickly change out wheels. It comes with 4 wheel sizes, and they leave nice, clean round marks. Its down side is its sort of clunky, and the handle at the base is big, making it hard to see where you are going as you rivet. It is priced fairly cheap though. The other rivet tools out there are really expensive.