once you adjust your brain, it's not so bad, seriously
It's actually kind of good....but first you have to adjust to the cringe- and groan-producing direction and pacing, and the obviously blue-screened, matte-lined actors walking through miniature sets ( which brings back fond memories of similar instances in "Land of the Lost"), and the sometimes meandering, sometimes pointless writing, and the actors who often seemed to be mixing NyQuil with muscle relaxers before sleepwalking through some scenes - "subdued" is a the first diplomatic adjective that comes to mind.
Once you accept that, and the fact that videotape made the smartly-designed sets look cheaper and less substantial than they were meant to, it's possible to enjoy, and even look forward to, each new episode.
After waiting almost forty years to see this show again, I have to say that, while an adjustment period is necessary, I'm not disappointed at all by the content of the US dvd release.