A moment of madness saw me buy two of these to replace a partly blocked Aqualisa I have used for 20 years, and also have one as a spare. The positive reviews here and Amazon Choice label perhaps stopped me from thinking how could a £10 shower head equal the superb performance of a £65 Aqualisa. Well it couldn't. I have two shower rooms, both with Aqualisa shower heads. I tried one of these on both, then put the partly blocked Aqualisa shower head on. In both showers the partly blocked Aqualisa flow rate was several times more powerful than this sad little H & S item could deliver. A straight comparison. Same set up for both. It would have taken an enormous amount of time to get a decent shower with the H & S shower head on. Both being returned to Amazon, an easy, no fuss experience so far (thank you Amazon), and I'll be ordering a new Aqualisa from Amazon shortly.