Based on a couple of days with this wireless door chime it seems quite well made; usefully loud on the "Hi" setting; easy to install with the supplied sticker pad (which is white, ideally should be black to match unit) and good value. When I need to change the battery I hope I don't disturb the sticker pad which will have to retain the back panel of the door button unit. If you need a new sticker anytime then get a car number plate sticker pad online or from Halfords, for example, and cut to size. Some reviews here mention the receiver gives you back the mains socket, but that is another TeckNet product and not this one which is exactly as shown in the image above. Upon delivery you have to remove the back of the door button unit and pull out the insulating paper from the battery - I think they could put a simple sticker on the button unit to make this clear to non-tech customers. Of the 32 chimes (chosen by successive clicks on the big button on the face of the receiver), only three are useful, at least in my opinion. The default is a ding-dong-ding-dong, the next a Westminster Chimes ding-dong sequence (both of which are quite good sounding bells), and then there is a cuckoo-cuckoo... -like sound. All the rest are tinny tunes best avoided. The unit seems to retain the setting after a power cut. The door button unit has a pop-off cover at the base behind which you can put your house number of whatever. Pity it also has the text "TeckNet" printed in black on the outside of the plastic which you cannot remove - makes it look a bit like this is your company name. I printed a large "PRESS" in white text on a black background which largely suppresses the "TeckNet" text. All in all, for the price, this seems a unit to recommend.