I too have one of these on each of my guitars and basses and I'd recommend them. They are discreet and work well, although keep in mind that it is not nearly as quick and easy to move these from one guitar to another as, say, a Snark (e.g., if somebody wants to borrow your tuner). In fact it's not quick and easy at all - which is why I keep one on each instrument. Also a Snark is more useful for string changes, since it's easier to put it where you can see it, and these are no better (or worse) than Snarks in a loud environment so if you play out you'll probably still want to use a pedal tuner.