I've been a software and systems engineer for 15 years, working remotely from abroad for a company back home in Norway. When I recently moved to the UK I needed a reliable Internet connection as soon as possible, and AAISP had me online the day after I moved in.

The connection has proven very reliable, the speed is good (considering I'm on ADSL), and native IPv6 support is fantastic. The staff, who clearly know their stuff, have been very helpful in getting everything arranged. Their online status and management systems are also among the best I've seen, although the user interface could use a fresh coat of paint.

Fairly expensive, but well worth it; I wouldn't hesitate to recommend AAISP for technical users.