I've been with ADSL24 for a year now and they're hard to fault.
They use as standard pricing policy as do many of the resellers, and although not the cheapest, you get plenty in return.
The control panels lets you do various things: you can see your approx distance from your exchange, change to a different plan/service, switch interleaving on and off, and view a detailed bandwidth usage report (so you don’t plough through your cap). When ordering, you can have up to 8 static IPs for free.
You can view and adjust a wealth of mail and hosting settings through your account login page. Forums, ticket system, e-mail and 24/7 phone number leaves you with no shortage of ways to contact them.
I’ve recently signed up to the ADSL24 forums, which is frequented by at least two of the support bods. The community is fairly small as you’d expect from a small ISP, but it has so far been a useful point of contact for some ISP specific chat.
I’ve never had any sort of lengthy downtime that I can recall. They generally get a bit of slowdown at 10pm when the off-peak bandwidth kicks in, but it’s never less than useable. For gaming, I’ve seen my ping down to the 18-25ms mark on a good Day of Defeat server (never higher than about 55ms on a really crap server).
A quick run through the thinkbroadband speed test gives me (on the up-to 8mb 30/300gb service):
Seed down 6337.79 Kbps ( 6.2 Mbps ) Speed Up 374.23 Kbps ( 0.4 Mbps )
… and that’s far from optimal settings on my end.
Overall: They seem like an honest bunch, and they're generally transparent with how they run their show: something that appeals to me. On the few times I've needed any custy support, they've been helpful. Occasional evening and weekend slowdown is a minor annoyance, but since I've only used two different ISPs in the last 3 years, I'm not sure what constitutes normal when it comes to peak/busy times.
Edit: Oh, and post number one from me. Hello all!