Social Backlinks was simple to install and has a very nice and easy to use interface. You are able to disable any plugins that you don't need or want and then the interface is super-clean with only a couple buttons to operate. When I had trouble with one aspect, I posted a support ticked and a new version was released in a matter of hours to address my issue. This is amazing since the price was so cheap. Better support than extensions costing 10x more. I also asked if the LinkedIn plugin would support "groups" and was responded enthusiastically that a future version might. Way to listen to your customer's needs! I also tried their "Glossary" extension and was impressed as well.