I've been a loyal A&A customer for about 12 years at this point, and as a networking professional, one of the biggest problems with ISPs, as an industry, is that they've trained their customer base to believe that the single selling point is maximum download speed.
A&A has consistently been amazing at tech and billing support, as in picking up on the second ring and immediately talking to someone that can fix your problem. They peer with basically everyone and do not over-subscribe their backbone, so my connection anywhere is at low and consistent latency. They've provided me with the same static IPv4 /32 and IPv6 /64 that I've moved with me around the UK. They've been running a dual stack network for as long as I've been a customer. There is no port filtering, destination blocks, or traffic shaping shenanigans on their network. They sell you an unfettered connection to the internet.
The max download on the line speed is also good.
Time With Provider: 12 Years
Package Name: FTTP