"I agree with the previous bad reviews-but, This product is actually very good. If a few simple things were sorted out. The set up instructions are very hard to follow, a simple rewrite would have sorted this. For some reason the item needs to be installed before programming. "What's that about?!" Other than this, when I finally managed to programme it, (crouched down beside a radiator for a half hour) the features are excellent. Weekend controls and the ability to set temperatures by the half hour. Much better than other makes. Also, it actually looks like a TRV. Not like the "bricks" stuck to the side of your radiator that the other makes look like. Which means you won't look like a heating nerd. If you persevere at the start it will be a good product, but simple design changes would have made this much better."
"Programming these is difficult as the controls are FAR from intuitive. Once set -up they work well and are very quiet. I would recommend if you were going to set them up once and leave well alone but changing the programming is so difficult you will not want to be messing with them."
"I bought these on the advice of our heating engineer because it is a good brand and has won an award. But they are horrible to use, tiny display that can't be read without crouching down and positioning your head directly above the valve, hard to understand controls - impossible if you are not a gadget-freak so don't expect your family to thank you for fitting these. The buttons are hard to see and give no feedback. I've also used a Pegler i-temp valve and this is a much better product, big clear screen at a good viewing angle, easy to read buttons that click when you press them, a big wheel to adjust the temperature and a reasonably simple operating method that many people will be able to understand. A vastly better product for real people."