I've recently joined a new provider following a house move, so without an AltNet available, I looked around and found Aquiss.
Since joining, any minor hiccup obstacle has either been dealt with quickly or rectified and you always feel there's always someone on hand to deal with an issue including the big boss, who dealt with the query, they also know who to talk to and when.
Speeds are solid, absolutely no slowdown or lag at peak times and when I had trouble connecting my TP-Link router, I found an entire support webpage with a full breakdown on how to connect the same model of router - I like the 12 month contract option and there customer management system is easy to use.
No complaints and prices are in the same ballpark as they bigger providers. I'd recommend Aquiss over any of the bigger providers any day.
NOTE: I have FTTP, but an ONT was already fitted to the property by BT.
Time With Provider: 6 Months
Package Name: Pure Fibre 330