The expansion is ok. They added a single story line, not individual class story line. The new planet is pretty nice and I completed the story line in my Black Hole/ Rakata gear ( Jedi Sentinel). To me being a WoW player this was more of a patch. In WoW the content for an expansion was vast and there was a lot more to do. However I still enjoyed the new content. My main has Artifice, Archeology, and Treasure Hunting. I can now learn the L50 epic crystals by reverse engineering . So far I have learned Hawkeye = Cyan, Purple, Black Red, Black Blue, Black Orange, Black Purple. Indestructible = Cyan, Black Orange, Purple. This has been a great credit maker for me.
Oooohhhh...didn't realised you could RE those now

Time I got onto that.
I've finished Makeb on a vanguard...about halfway through on my Guardian Tank.
Also working on Sage @ CL45, Scoundrel @ 40, Shadow @ 20, Sith Sorc @ 41, Sith Marauder @ 37, Powertec @ 17 and Operative @ 13
Probably finsih the guardian next followed by sage and sorc.