I don't know why, but the battery in mine didn't work that long.
And as soon as I started to change batteries, the battery life declined fast for some reason.
It works and looks great, but the clip on the back (the one that keeps the battery in) became quite loose and soon after I found myself filling the small cavity up with paper, just to get enough pressure on the battery so the tuner wouldn't quit on me.
I just ordered the Uni-Tune, curious to see if it works better.
Overall I just this for quite some time, but it became an annoyance.
Round 2 is the Uni-Tune vs the Korg PC-2+!
Results later this year :)