It's pretty solid. It is nowhere near as bad as its reputation. The irritation of the senior officers with the kids is convincing (because we viewers are irritated too). It's important that the kids are misjudged in terms of their ability: they are able to take over the ship, which is something no one anticipates.
There is one awesome moment: after the sonics have incapacitated the crew, and Adam's "Yay-ayyy brother" echoes over the limp bodies as we break to commercial. That is terrific.
There are easily 10 worse episodes in s3. It's not bad at all. It only makes us squirm because of the costumes and singing.