Definitely worth stopping by. As others have pointed out, it's modest in size, but not content. I didn't sit through the entirety of every video installation (I think one was like 6 hours long ), but I did take enough time for me.
There's a wonderful diversity amongst the artists and works featured, and it's doable in a couple hours. Photography is allowed, just no flash. The folks working there are nice, the admission is fair, and there's WiFi for the guests (get the password at the front desk ). Oh, and definitely go to the shop!