Just wondering if anyone actually has one of these? They have dropped in $ quite a bit lately. A few questions for anyone who can help How accurate is it? How quick does it ACTUALLY tune the guitar? How long does the battery stay charged for? How many tunings can you store?(I use alot of alt tunings.... the one reason i'm considering this) If I use a capo will that be a problem? A440 but then I put a capo on the 4th, 8th fret etc. Will it know how to tune it properly? Finally, do you think this will last the test of time? I am worried about having this useless technology attached to my SG in a couple of years. Is there some sort of guarantee?