I've also broken them before, which is irritating. More importantly (to me), I've never been happy with their performance. I can't tell if it's accuracy or precision that's lacking but my ear tells me that my banjo or uke is not in tune even if the Snark says it is. On my double bass, it basically doesn't even register the low notes, so it's useless there too. I occasionally use the Peterson app on my phone but my favorite tuner for years has been a Korg CA-20. It's not as convenient but it's as good as my ear or better and it picks up all the instruments.
My planet waves headstock tuner is okay too. I have another Korg clip-on tuner but its not available anymore and its arm is flimsy. It is really accurate, though.