Short Battery Life
Can't beat the price, or the slim look and feel but some of the cost savings may have come from a smaller battery.  The charge only lasts for 3-4 days, twice a day brushing for the full two minutes, about half that of my costlier Sonic.  Since my charger is somewhat inconveniently located (due to small bathroom) this is an issue for me.  The oversize brush head is intriguing!
Rating: 3 stars