Plot holes, Spock's closing remarks to Rand and the missing insignia aside, I always rather enjoy this episode. I always appreciated that we glimpse Sulu assemble a phaser pistol and its ability to fire three beams simultaneously. That's the kid in me of 40 years ago talking....but those moments still ping within me. The "no shuttle craft" point always bothered me, though.
For the aformentioned points and for its willingness to push the envelope, and for its fun...I give it a solid 6.