I use the ollie baker, it has been fail safe thus far, besides the time my hand slipped off the crank handle and I broke the handle with my knuckle, goes to show you that anything can work, anything can cause problems just have to use caution when dealing with mainsprings, I dont have experience with any other but I have seen some of them and they do not appear to be as sturdy. for a tool on the market I would recommend the ollie baker. William