Are you a paying "guest" of Classmates.com and has it been worthwhile for you?

i get emails all the time about “someone you know has signed your guestbook” and stuff like that from Classmates.com. i don’t necessarily want to pay for some other site that is just going to bill me monthly and use me to target advertising. however, i have to admit i am curious who i know that may be on it.

I see they have different levels of membership, of course, each one costing more but supposedly giving you more access to info.

Do you “do” Classmates.com and do you like it? i am tempted but want some testimonials to help me decide.