I have a superhub 2 and it's been hopeless since I got it. The SH1 we had before our speed boost was rock solid, only after changing the hub has things gone pear shaped, old hub no longer works as I've also tried that option
Wifi drops several times every day and even wired sometimes drops out for no reason, reboot normally cures for a while.
I did try phoning but the advice given was something I'd already tried several times and I don't want to have to reset my router every hour or so.
I've been told to post in here and I may get some help.
After engineers visit he concluded that my SH2 was indeed duff - as I'd been telling online chat and phone help all along - and installed a Hub 3.0 which has been faultless and also much improved wifi signal strength and speed.
So if anyone is having trouble skip web chat and phone, post in here and you have much more chance of getting a helpful response.