purchasing EMS units

What do you guys think of this unit? http://cgi.ebay.co.uk/Muscle-Toner-EMS-Unit-2-channels-4-pads-NEW-Top-Value-/230482282705?cmd=ViewItem&pt=UK_Sporting_Goods_Exercise_Fitness_Fitness_Accessories_ET&hash=item35a9d088d1

I’m considering getting an ems unit depite being a little skeptical still (in terms of enchancements in power, recovery etc), what results have people here seen from them???