Just surfing around and noticed the netgear wifi booster now only £14.99 - I was going to get one for the garden but then didn't bother as the price went up. But lo and behold its at £14.99 today so I got myself two.
I have the R7000 router so I hope this works well with it.
Can never have enough Wifi!!!
NETGEAR EX2700-100UKS Mini 300 Mbps WiFi Range Extender (Wi-Fi Booster)