Great for the price
This is a very powerful brush that cleans the teeth oh so well.  We have used quite a few of these already, which is why I give it 4 stars instead of 5.  The brush lasted us about 1 or 1.5 years max (maybe less sometimes).  Though the dentists might dispute this, the brush cleans well enough that even if you skip flossing every now and then, it is quite all right.  We kept replacing the heads as needed.  Don't regret the buy at all.
Rating: 4 stars