Well, the setup is a bit quirky, as others have commented. Couldn't get it to link with the router by WPS for love nor money, but set it up OK by logging on to it wirelessly.
Not the strongest signal I've seen from an extender but OK for a small, two-storey detached. Anything bigger, get something else (I have a tp-link double antenna one, which is very good).
Haven't seen this mentioned by anyone, but when it's setup, you log your devices onto the network whose name is an altered version of your original network (network name followed by an alphanumeric code) -- that is worth knowing, I think.