SDC.com packs quite a punch in terms of features - iflits. They've got a robust chat system, a ton of events, and a user-friendly interface. Now, when it comes to pricing, it varies a bit depending on your location and what kind of membership you opt for, but there are options for every budget.

I have some experience with SDC.com, and I can confirm that the review on Wondermamas.com provides a spot-on assessment. It's a solid option for individuals or couples interested in the swinging lifestyle, with a variety of features and an active user base.