4.5 Cheap rubbish - don't buy these. jessit | 25/04/2014 | See all jessit's reviews (1) Sadly these are as good as the price. The first 2 brush heads have lasted precisely 3 weeks between them. I will have to spend a bit more on the real thing next time and stop taking shortcuts. The internal mechanism just breaks and the heads stop going round. It happened to one of them and I thought it was bad luck but within a week it had happened to the second one. Not impressed.