This is my 4th Philips clippers and I must admit, it is less convenient to use than the one I had before. (QC5335). Indeed, the hair tends to get stuck between the knife and the comb and must board many times guiding with a comb for a perfect cut. (Despite the new system blades and combs !!!) Fortunately, the price was good on the website, making up a little (hence the 3 stars ...) Level reliability, I hope she will do better than the previous mower that worked only 3 years (for 40 cuts per year for the family). FYI: what has unleashed on previous models: the battery (this new model is therefore lithium ion priori better than the Ni-mh) and the axis (eccentric) engine output (the engine was still running but the blades were not entrained). So far we were satisfied with the cutting efficiency of Philips models (having tested other brands I can tell you that the efficacy / price was excellent Philips) but is back on the latter model. it cuts anyway, but it was better before ...