Eh, perfectly fine. Probably a 6.5/10. The pacing was strange, with what felt like 3 different stories in the episode's three acts -- the first space battle with Grievous and the asteroids, the adventure on the scavenger ship, and Anakin's solo fighter pilot battle with Grievous. All were fine, if lacking in particular imagination. R2D2 being lost is as good a story-motivator as any, but Anakin's whininess about it and the cartoonish incompetence of the R3 unit took away from it. Also, the score was strangely plinky (I suppose to convey that this is a droid-focused episode), and it came off as pretty odd. And Grievous continues to be a cackling, largely ineffective villain, who doesn't begin to convey the menace his 2D Clone Wars counterpart did.
Again, nothing offensive here, but nothing really compelling either.