This watch-case press is completely underwhelming upon 1st view, and really should come with better instructions, but when you consider that for the price of a single watch battery replacement, you're purchasing the ability to perform a replacement any time you need one, it's cheap at the price. I haven't tried it on the one square-cased watch I own, but it has worked a treat on a couple of my round-case watch backs so far.

In short, I'm happy about my purchase.