"I fitted this to my towel rail because the wife and kids kept leaving it on. It has saved me a fortune. I took off the switched fused spur outside the bathroom and put this on. With some help from Elkay Technical dept they advised me to get a 220A-1 which Screwfix doesnt stock because I needed more space for the back box. It is basically a spacer plate which gives you 10mm more room. I set it to 1 hour so when it is pressed it goes off after one hour. Connections were done trough connector blocks and a single feed into the terminlas which are quite small."
"I've put these on two bathroom towel rails so they turn themselves off after an hour. Does the job fine. I have a few niggles though: 1. The locator ring has two very bright blue LEDs behind it. One of my switches is in my bedroom, and I've had to tape over it because it's so bright and annoying. I bought a timer not a nightlight. 2. It says it can go into a 25mm box. I used a deeper box than this, and needed all the space I had. 3. The terminals are small so can only fit a single wire. For the neutral connection I had to use a piece of junction strip then a single wire in."
"I bought and fitted one of these, controlling a simple light, in July 2013. It worked well and as expected for about 17 months before it failed. When it failed the light just quickly flashed and then went off and then flashed again when the time period finished. I reckon it was pressed less than 1000 times which I don't think is very reliable."