After writing an unfavourable review of the Philips QT4015 trimmer (which I returned to my retailer for a full refund) I decided to purchase the Philips BT5205 trimmer. The selling point for me was the 0.4mm trim in the specifications. I used this trimmer with trepidation and was half expecting a poor performance as with the QT4015 model. The two models are polar opposites and I was really pleased with the performance of the BT5205 model. It glided over my face and provided a smooth even trim first time over. This trimmer easily maintains my stubble and is an absolute joy to use. It only takes an hour to fully charge, and can be used both cord and cordless. This trimmer is also completely water proof. Philips have redeemed themselves with the BT5205 model and I highly recommend it.