I've been very pleased with mine. Been using it for months. I thought the weight of it would be a bit much, but not at all. It was simply that I was used to a little 900 mAh ego batt. Now? No biggie. I've had no issue with the button either. As someone mentioned, that must've been taken care of quite some time ago. The charge lasts days, then draw is the same from beginning to end.
I was on the fence, too. Then I just bought one.