Anyone used sse ultrafast broadband?

[passmyglass]

Apologies if this isnt the best place to post...
Aparently they do the fastest bb in my area (and cheaper than bt)
Does anyone have anything positive or negative to say about them?

I am wary of signing up to something and finding that superfast is actually not and their customer service is crap. It might be obvious that my grasp of technology is somewhat outdated!! Tia