This was one of the best of the old-school Afterschool Specials, basically a comedy but with a lot more to recommend it.
It was written by Arthur Barron, who a few years earlier had written and directed a "teenager movie" with some definite similarities to this show, including the appearance of some of the lead actors (although Alfred Lutter was a bit shorter than Robby Benson, they were the same physical type otherwise).
His teenage protagonists have a lot in common with each other. They tend to live in New York; they are contemplative and reflective beyond their years; they are intelligent and appreciate music and art; and they are interesting to watch...at least if you grew up as a shy teenager yourself. These aren't the teenagers troubled by drugs and pregnancy that came to be media staples a few years down the road. They are 70's characters,with likable, nurturing, non-toxic parents. They might be a little hard for modern TV-watching teenagers to relate to. Which is not intended as a criticism as Arthur Barron, but of the current culture.
Apparently the rights to this show were bought by a company which made educational films, so the chances of it ending up on DVD, as other Afterschool Specials have, may not be great.