Philips AventTwin electronic breast pump

Bought the duo for expressing milk for my twins. One of the best 'twin' purchases in my opinion! Very comfortable to use, quick to assemble and fairly quiet. Only gripe is this one time (after about 4 mths of use, or approx 850 uses, the flexible silicone diaphragm wore out, which sent milk straight through into the pump unit. I rang the helpline, was told to dismantle, drain it (taking care not to let milk touch the electronics) and dry it out on the radiator and it was good as new! Apart from that one incident, its been working fine ever since, although some of the moving parts have worn out due to general wear and tear (I express about 6-7 times a day and then bottle feed as I have help and I can see how much they take). I think its a great purchase, and am very very happy with it although it's quite pricey for what it is. However, if you are intending to use it as intensively as I am, then it may be useful to purchase additional spares which is what I've done.