As it is and the price I got this for, I would give it a 5 star, if money were not part of the equation, I would give a 4. It functions well and is better than some when it comes to accuracy. Some others have a rack and pinion style setup for adjustment, but they're much more expensive. All in all I really like it, I'm glad I bought it and I would buy it again, if there were one complaint I would have, it would be that the spring that holds tension for the tool is super stiff. You'd better make sure you have your workpiece clamped down well or the pressure it requires to push it will send your piece flying, but that is my only drawback.