The first device I have not purchased through Amazon but at retail. Unfortunately, it has adjusted the service after 1.5 years, there could no longer be switched on via the switch. Although me an irrigator with a bit more power would actually have preferred, I have yet again opted for the same model. This I respect because of more favorable prices on Amazon. Unfortunately, this device now misfires at the counter, yet I can not but encourage repeatedly with a little "tweaking". Seems to be some bad contact. It is therefore likely that in some time this device must be taken out of service due to the same defect. Much more serious is that this equipment or the construction of the tank can not tolerate mouthwash, although recommended by Brown. After a short time, namely the Kunststoffsiebchen over the opening dissolves down from the mount, is really "pissed" and can no longer be secure. The spare parts worked on the retailer specified by Brown easily to me. After I had the fear of the first defect would have been at my mouth water, I have replaced this and unlike in the past also added only after filling with water. But unfortunately nothing availed. Even the sieve of the second water tank has now been solved. In order for a replacement would be needed again -. Cost sometimes just a measly 18.90 including postage. That's me in the long run too much, especially since it is anticipated that the switch also only hold out for a short time. But the way was me no one explain why the first unit, the problems with the water tank did not occur, the second now in a very short time equal 2x in succession, just as they were at a loss because of the loose connection - commentary Hotline: That is probably just bad luck. Well thank you! My very first oral irrigator of Brown has kept in daily multiple inserts 18 (this, there are of course no longer), the successor to create even more the warranty period! For me was it that in terms of oral irrigator von Braun. Pay me now a little bit make smart Amazon and test another manufacturer. Thanks to all the reviewers here on Amazon, which help in the decision!