I quit when they got rid of their SMS and IM capability. That was really the only thing that set them apart. If you're already on Facebook or some other social network, it's just redundant.
Not at all. I dislike FaceBook because of all those ridiculous apps. and quizzes. It becomes yet another obligation in a day already filled with obligations. I don't want to water some girls cybergarden from high school. I don't really care if I am smarter than my best friends husband, I knew that 15 years ago.