Review (5/5): Great Toothbrush, Especially for College
I've used this toothbrush, the essence 5600, and the flexcare r910. The flexcare is more powerful and has better brush heads (it also avoids the problem of having water trapped inside the brush and growing mold), but it's also far more expensive. The essence 5600 is a waste of money in my opinion as it has the same performance as this toothbrush, but suffers from a shoddy li-on battery that dies after about a year or so of use. This avoids the battery problem by using replaceable AA batteries and lasts quite a while on each replacement.
The only major con is with the brush head design. There is a a gap between the brush body and head, and this gap tends to fill with water after use. This unfortunately leads to black mold growing in the cavity. It's easy to avoid this by simply unscrewing the head after brushing and rinsing out the cavity, but it's an annoyance nonetheless.
All in all, this is a great cheap way to get the benefits of sonicare.