I'm on an ADSL2+ deal with Adam internet. Basically I get 10 Gig a month of downloads and uploads and if I go over the limit, my net slows down to dial up speeds. So I always try my best not to go over the limit. It's a pretty decent deal and it's quite affordable too, the best thing is that I don't get charged if I go over the limit. I'm sure that if I did get charged I would've racked up a few massive bills by now.
Same as Sashman here, but "Naked DSL" (same as ADSL2+ but without having to pay for an active phone line) and a 12 gig a month download limit (used to be 10). It kinda sucks being on a download limit since we don't have those kind of limitations in Denmark, but it's better than no internet at all, and if I have a month with lots of traffic, it's relatively cheap to add a data block to your download limit.