AOL is first-class crap. Flee it as soon as possible. 40gigs pretty generous too.
EDIT:
OK. So i've just looked at the site. You're getting up to 8meg broadband, 40GB download limit, and unlimited calls to UK landlines and landlines across 28 countries for £20.99 per month, which includes your line rental. That's a pretty sweet deal. Where do I sign?