I tried to get BT Infinity fibre optic a few weeks ago. But they delivered the equipment to the wrong address and the engineer didn't turn up on the arranged day. Every time I spoke to them on the phone, they didn't have a clue about the problems I was having.
Eventually I cancelled the order, but I'm still having problems with my refund.
It's a shame. Technically, it looks like BT have a great product with infinity, but their customer service is utterly shambolic.