I live in the middle of a field in Norfolk, and yet I have gigabit, fully duplex, uncontended internet access. Even though I had an adequate (22Mbps) service from BT, it was so unreliable and the customer service so poor that I was desperate to get away from them. B4RN have been a revelation. Tech support who understand technology (not once have I been asked "Switch it off and on again"), engineering support for faults that's way faster than BT's "wait 4 days" nonsense (who can do that in the 21st Century?), despite them having to travel down from Lancashire on occasion and reliability that BT can only dream of; no longer do I cringe and wait for the service to disappear when it's windy (B4RN's services are all underground). I'm very, very pleased I went to the bother (and expense) of digging up my yard to lay the duct that carries the fibre, and since B4RN are cheaper than my previous ISP, I shall recoup that money eventually, anyway! And now my wife can stream an HD movie on Netflix, I can be on Spotify and downloading a Linux kernel and it "just works". Wonderful.
The only minor concern I have is whether they can survive the inevitable "growing pains" of a small and successful company - I was an early customer of Demon Internet, so I've been through that once already!