The super hub 3 is a better system I used to suffer with bad wifi around the house and in the back garden using the no 2 since there installed the 3 I get a full sig all over the house and in the back garden seems to be a much better unit
have to agree with @ant1 mine has been fine and since its been installed Wifi is a lot better around the house, I didn't need the wootoo repeater any more.
Only moan i have is the SH 3 has no VPN pass through at the moment. There was supposed to be a firmware update ages ago but it never occured.
I have to put it in modem mode and use my own router for my VPN
Other than that it works fine, good wifi and speeds.