That sounds right. I haven't seen the tv series myself. I think it'd be hard to go back and watch it now, considering it's age and the amount of effects it would require.
The effects were horrible. However, with both the tv show and the radio show, Adams wrote the script from scratch, so each version has its own freshness about it. I actually started on Hitchhikers back in the 80s, so I heard the radio show first then the tv show then the books and finally the movie. I was more dissatisfied with the movie more than any of the others, but it couldn't possibly meet my expectations.
Yeah, I think I was kind of underwhelmed by the movie as well the first go around because of my expectations. I dunno though, it stuck in my head because there was really nothing else quite like it (much like Labyrinth or Wizard of Oz)... and as time passed I kept thinking "you know, that movie sure did a lot of neat things, like the art design, Marvin, Ford, Arthur, the random quirky stuff, the guide itself, the gorgons (another Jim Henson workshop success), the general vibe was right"... it started adding up in my head to the point I just had to see it again and ended up falling in love with it.