Received this as a Christmas gift.  First, the unit does not turn off.  I powered the unit after I opened it and then went to use it two weeks later for the first time and the unit as completely dead.  Had to recharge and the recharge time is pretty significant, over an hour for full charge.  I read that disconnecting the probes should turn it off, also saw on a webpage that if you press for two seconds with the probes out, it turns off.  I tried both many times, and the blue tooth connection is still valid, so obviously the unit is not off.  
Second and more importantly, any slight movement of the probe wires and the probe disconnects.  These connections are very loose, and I mean very loose.  I hooked it up on my counter and simply staring at it, the temp probe reported disconnect.  Maybe this unit has some issues, but for the price, these are not issues that I would expect.
I saw another review reporting the same probe issues, so I don't believe this is isolated to my unit.