I have been a paid member of AM for around 3 years.
Pros
Credits do not expire. There seem to be more women in my local area actively using the service than most other similar sites. They seem to be real.
Cons
Only met 1 woman after all of this time. Very few women respond to contacts. Sometimes gay men pose as women on the site. If you are super tall, dark and handsome you might have a really great time.