The brush is intentionally overpriced at £150+ then the retailer knocks the price down & Braun offer £15 discount but put in the small print proof of postage in not proof of receipt for the offer!!! I will not buy or recommend Braun products to anyone again as the company are a bunch of con-men. As for the brush it is probably as good as a Philips brush, but you are being ripped off with the price & offers also u can't replace the rechargeable battery, so what is it costing to run this thing also with the exorbitant price of replacement heads that need changing ever couple of weeks. Stick to a cheap discounted toothbrush if u have to have electric, then u can throw them away. Better still use a manual brush costing u less than the price of a Braun replacement head& think of the calories burned using a manual brush plus the saving on electricity. Remember who you are dealing with Braun did not honour my £15 discount voucher even though I sent it recorded, kept a copy of the reciept, bought 3 packs of there special toothpaste & 8 replacement heads. The only reason I can think is because I got a discount off Boots but that was a boots promotion not Braun & I still paid over £100

I was given a Smart Oral B as a gift and i loved it. Apart from spending a fortune on all the different kinds of heads, it can become a little compulsive.
However, all that changed when just a little over the 2 year guarantee, my tooth brush died, it just no longer charges. I have spoken to customer services and apparently it seems my battery has come to the end of it's life expectancy. Once this happens, the whole unit is defunct. The dead battery can't be replaced, nor can you buy just a new hand held unit to use with your current smart system. Apparently they expect the battery to last for 3 years, but this depends on how often you brush your teeth, three years is based on brushing for 2 min twice a day. Naughty me must have brushed my teeth more than that since mine only lasted just over two years.
So just be aware the unit will only last 3 years at the very most. Then it will become landfill.
I think they should tell people this when you are looking to buy it. Does the British Dental Health Foundation, who recommend it, know that the more you brush your teeth with this product the more you reduce it's working life. Not the brush heads, that makes sense, but the whole unit becomes defunct!