Great tuner!! not nearly as fidgety as the intellitouch PT-2 i have. super compact and cheap (in price)!! this little guy is great and is by far my favorite tuner. It is very consistent, lights up beautifully, and doesn't have any problems registering any notes (such as your low E like the PT-2 and other clip on tuners). It is worth every penny and i highly recommend it!
As for cons, it seems to take a split second for the tuning needle to go up to the note that is plucked at first (compared to other tuners). and the buttons buzz when you pluck certain notes hard enough. but neither of these things discredit it as a great tuner. their just little annoyances that don't effect its performance.