Many people only post if there's a problem, so I thought I'd post some praise for a change.
Upgraded from regular broadband to BT Infinity2 a week ago. The engineer took just 5 minutes to make the change. My new BT Home Hub 5 has disconnected just once in that entire week...and has remained on a constant speed of 76.93mbps. I can now download all 15gb of Bioshock Infinite from Steam in just 19 minutes. It used to take over 7 hours.
And its all pretty much the same price I was paying before. So well done BT....I'm quite happy.