This was my first vibe, and was well loved. The battery it came with lasted me roughly a year, and when I went to replace it with a new one, there were little to no issues other than the fact it died WAY quicker, like in a matter of months. Might've been a bad brand though, I'm not blaming that on the vibe.
However, when I went to replace *that* battery, I started to have issues. The little bent piece of metal that stretches the length of the vibe to touch the contact wasn't properly connecting anymore, and I also began to have an incredibly hard time screwing and unscrewing it. (I can assure you it was clean, it wasn't a buildup problem) The treads would very easily miss the cap, so it'd screw on the wrong way, and it was veeery particular to get back on right.
Even with a fresh battery, it still performs as if it is dying due to the limited contact on the inside (I've tried bending it back in place, but that only did so much). I highly recommend tantus's other products (I've had plenty of fun with their dildos, and they've well withstood the test of time) but I'm not sure if the vibe is the way to go on this one.