This cleaner is pretty nice to make your cymbals shine again and could not be easier to use. Just spray it on your cymbal, wait a little bit (around 20-30 seconds) and wipe it off with a clean towel.
As long as fingerprints or other dirt are'nt on your cymbal for too long, this cleaner really makes your cymbal look like "out of the manufactory".
But if your fingerprints or what ever have allready been on your cymbal for quite a while (let's say for a few months) and might allready have reacted with the bronze, this cleaner is not strong enough (that's the "but....." part).
Good news is: I don't know any other cymbal cleaner which would be strong enough for "old dirt", so all in all a very nice and useful product.