I still remember this cartoon as being as enjoyable as it was when I was much, much younger. Sure the characters were cutesy (poor Flirtacia mooning for the unattainable Gary) and the giant Gulliver was a "hunk" (well, as good-looking a guy as a kid like me could appreciate at the time), Captain Leech was very much in the hissable baddie mode.
The stories were quite good - and the action music scoring was very dramatic for a production made (ohmigod) 40 years ago. Certainly a long way from when Hanna Barbera started with characters like Yogi Bear, Snagglepuss and so on. In fact the period between 1966-1968 was a good time for cartoons. Sure, to some they might be hokey, but compared to the silly violence-riddled junk watched by kids these days, a little toning down on the blood-and guts wouldn't hurt.
The good old days - who could ask for anything more?
