The two biggest problems are 1) The "viewed me" feature constantly shows people viewing your profile, but they really aren't (I've been told this dozens of times and it is embarrassing to write it to someone who supposedly viewed you, and they don't know what you're talking about), and 2) most of the profiles you see are not paid members and therefore they never can see your messages. That's just a way to get you to pony up for more features.
Thank you for your review, we are very happy for you both.