The experience has been quite pleasant so far.
Not much of anything to say about the quality of the connection itself; it Just Works™ as I'd expect. Cannot help but notice, though, that whenever I run speedtest, it genuinely shows me the full 950 Mbps down, so I haven't seen any traffic shaping so far.
Where A&A really shines is a few extra services which aren't being offered by pretty much any other ISP (and I've seen quite a lot of different ISPs). Just to name a few: an external static IP offered by default, IPv6 /64, a routable IPv4 /28 (!!!), and reverse DNS for all these. If you don't know what these words mean, you probably don't need them; but if you do, then you probably know when was the last time you saw a home internet package which allowed you to run your very own e-mail server on a Raspberry PI in your closet :)
Was also pleasantly surprised by contract conditions when switching to A&A: as of 2026-08, they offer as little as 1-month term (!) with a £15 setup fee when migrating from another ISP, so you don't have to worry about getting locked in.
On customer service -- only had to reach out to them to request/amend additional services (otherwise things Just Work). The turnover is pretty quick; while they aim to respond in 1-2 business days, in practice this happened to me within 10 minutes or so.
Time With Provider: 2 Months
Package Name: Home::1 1000/100 uncap'd (via openreach)