Moved to AAISP after yet another frustrating experience with BT.

Could not be happier. Yes they are more expensive, but you get what you pay for. Support has been excellent. My queries were all about non-standard hardware or just asking for clarification on how their service worked, not due to any particular problems I had. I received prompt, friendly, sensible and *helpful* responses to my queries. Help and support is available using various modes of communication, including phone. No automated system encountered so far, go through to an actual human each time!

Connections has been is without fault. There is absolutely no buffering or degradation of Netflix or iPlayer at peak times like I occasionally had with my previous IP.

Provided router is surprisingly good. It does look pretty cheap, but in terms of actual performance it outpaced my old draytek router in terms of wireless range and speed. Not as feature rich as some of the higher end ones, but it does the job.