Having successfully bought one and installed it in one location, I purchased a number of these to install around the house. I have to date, 3 months afterwards, still yet to install the others. The reason for this is that these boxes do not install into ever 'standard' UK electrical household fitting. A shallow electrical box, as used by electricians on our house (now 14 years old), will not accommodate the LightwaveRF fittings. You will need to either find a cover to give you further depth or, dig out and replace the shallow electrical box with a deeper one if that is possible. Either way, I would advice just checking to see that the light fittings you are intending to replace with these are standard deep boxes and not the shallow ones which are sometimes used when your house was built with plasterboard and the wooded batons behind (studs?).
Otherwise,.. the working technology itself, in combination with the other products (the LightwaveRF receiveer, the app, the other LightwaveRF products).. is very very cool. While the app interface is clunky by modern designs, it does function and does allow oyu to easily turn on and off lights etc from anywhere in the world. Pressing a 'Sequence' button will run your pre-determined sequence for all the lights you have connected in the house... if you wish.
I do 'like' the product, but where it states that it just fits into existing UK light fittings,...it is not true for most of the light fittings in my own modern house. Thus, my 5 stars is curbed by the fact that I cannot actually use several of the items I purchased because they do not fit and I need to think about some alternative DIY to find a way to get them too. (I have consulted a registered electrician for advice too).
The other slight issue, is that the server which receives the commands from your phone or computer is sometimes down or sometimes does not respond to action your command to turn on the lights. So, it can be occasionally slightly temperamental when sending commands remotely from your phone or other internet connected device. But within the house, with the LightwaveRF remote switches, you will not have that issue.
So my tip, is to check on whether you have 'Shallow' or normal electrical boxes behind your light fittings, I guess, a particular possibility some with modern houses.