I've been an AAISP customer for over a decade and haven't experienced a single thing that I wanted to complain about or that frustrated me about their service.

The sales and support staff are all very good - they don't have scripts, they don't need them, because they understand what they are talking about.

I chose AAISP because they were the only provider at the time who offered blocks of static IP addresses at no extra charge (when BT were charging £28 per IP address per month, AA said there may be a delay if ordering more than 128 addresses at a time, but there was no charge).

They let customers run whatever services they want on their lines; there are no blocked ports, proxies or filters. Customers can have their own reverse DNS for their static IPs. You don't need to talk to support or sales or an account manager to change settings - customers have access to a lot of account settings so if you're confident you can make changes yourself.

When things do go wrong, there's no hiding or denying going on - status updates are honest and frequent.
When there is a problem reported it's investigated properly and quickly and customers kept informed.

I've never had dips in speed, unexplained outages, excuses or crazy changes of terms. The prices charged have kept on dropping, in line with BT wholesale prices. Always transparency.

I used to work (in networking) for a broadband and internet service provider, but never considered switching away from AAISP.