SO FAR SO GOOD!
I've used several of these head shavers, and they all crapped out after a few months.  However, the quality of this one appears to be much better.  First of all, this shaver appears to be built to a higher standard - it doesn't feel cheap and there's a digital counter on the grip that tells you how many minutes of power are remaining.  Pretty cool.  I've used it  4 times now and there's still 60 minuter remaining, so the rechargeable batteries last a long time.  Also, this one shaves much better than the others I've had.  No more going over the same hairy spot on my head until the skull shows through.  The hand grip is very ergonomic and there's no problem manipulating the shaver with wet hands.  So far I'm very impressed.  I'll update this review if anything changes.
Rating: 5 stars