My family has a long history with this show. My older brothers used to watch it with my dad a long time ago, until we lost the MeTV channel from our TV. None of us had looked at this for years after that, but recently, when we were able to bring it back. Now, every Saturday night, we watch an episode of the show, and it's nice to have something to look forward to after a long week.
"Svengoolie" is basically a show that resurrects old horror, sci-fi, and mystery films from the thirties, forties, fifties, and so on. The host, 'Sven', credited as the "Man in Hat" on the credits (played by Rich Koz), is conceptually creepy but in execution is portrayed as no more than a laughable, pun-loving persona who presents facts about the films, makes ridiculous jokes, and sings absolutely hilarious songs during the intermissions. The movies are about an hour and a half each; the rest of the two-hours is taken up on commercials and Sven's brief commentaries.
The movies, I would say, are quite good for their time period despite the negativity surrounding how bad some of them are. Personally, I quite enjoy them for what they are and despite poor effects and maybe slower pacing, most of them work very well today. I especially enjoy Sven's ridiculous songs that play upon events from the movies - if you like this kind of humor, the show is for you. Of course, this kind of thing is getting harder and harder for most people to appreciate these days, due to the plethora of more fancy, special-effects-based horror movies audiences indulge in now. But this show has an audience, and I'm all for it.