I enjoyed the event.
First off, it came at a good time. My main was at level 45 and I was getting ready to go back and do the Alderaan bonus series -- which was green to me -- just so I could go back to Voss and not be under level. The Tattoine quests were closely packed, easy to acquire, and fast. I did the series for six days to get the costume set, traded in my samples, and was done and level 46 1/2. Never had to go to Alderaan. The event got me through a dry patch in terms of quests.
I liked the way it was revealed. Players were talking about the event before any official announcement was made. It was more organic and exploratory, and for us roleplayers that made it more interesting story-wise.
I liked the rewards. I don't need a new crystal, but I could pick up a PvP crystal as an alternate against the day that I dabble in Huttball or something. I got the red Rakling pet from the scavenger hunt quest and it's perfect. I only had enough samples for the crystal and one companion box, but I got a great one: Quinn. Since my main uses Quinn in battle almost all the time, and I really dislike the fact that he betrayed me, I decided to give him the Rakghoul virus as punishment. I feel much better about him now.
I know many have complained that the event was forced on people, but I cannot agree. Vaccines were long lasting and easy to acquire.