I'd put AFF somewhere in the middle; there's no doubt it's better than other sites and it has what you need - a lot of ladies. I'd say it doesn't have as many as hookuphangout.com (in my area, at least), but there is still enough to keep you busy.
There are some time wasters, but overall I enjoy this site a lot and will be renewing my membership for longer when my month trial ends. It's nice to be back in business.