I have all the grade 5 artifact upgrades/proton and it's fun every time I do it. I stopped doing the really low level ones though because I only get like 15 credits and 1 commendation but I do the top 4-5 quests. I really like it as a diversion from the norm. Considering that Ilum was a let down to me personally, it is probably the most fun daily in the game right now you can do by yourself.