0 rating actually. Not good, had to return it after one day. Battery runs down really quick and unit overheats badly. Lithium battery May blow for all I know.Update: worst return experience ever,1. Have to provide own box, like I keep boxes around???  Really?and use packing material?  Like I have that hanging around too??2.Have to go to UPS3. need shipping label printed out but no print function was provided with labels,4, Said to call with questions and offered no number.5.  No refund until they receive.Why does amazon allow this awkward process?