How good is this film? When I first saw it in about 1996, I didn't know it was from the late 70's: I assumed it was another new 'manga' (as we mistakenly called them in those days), and furthermore I remembered thinking "Wow, this is so much better than all this other stuff."
'Castle of Cagliostro' is Miyazaki's first feature film - yeah the director of 'Spirited Away' doing an action/spy/heist/comedy film crossed with a 60's James Bond flick. It wasn't his first acquaintaince with the characters, though. He was the director for most of the first TV series of Monkey Punch's characters back as early as 1971.
'Cagliostro' is a classic and unique animated film. It's not just a historical curio: I think it's as good as most of the later Ghibli films, and better than some of them. For a start, this is that rarity among anime - a film where the characterisation, plot and scenery detail are in perfect balance. Anime is often justifiably criticised for overly intricate plotting at the expense of characterisation. Miyazaki is sometimes rightly criticised for spending too much time on luscious detail and setting, while the plot meanders. None of that here. The plot is tight and propelled perfectly by the narrative (he had a couple of other writers working with him here, and I don't doubt that's why. Plot has never been Miyazaki's forte), but at the same time it never gets more intricate than, say, 'Goldfinger' or your average live action heist film. There are surprises and twists (you know the ending is going to be unusual, but there's no way you'd have predicted exactly what happens).
The characters are nearly all great, too. I often think that some spaceship designs are classic - The Enterprise in 'Star Trek' or 'Discovery' in 2001. Here there's something instantly classic about the visual design of Wolf (Lupin) and especially his chain-smoking accomplice, Jigen. The Samurai guy is a bit weird - I can't quite understand how he was nescessary to the story, but nevermind. (*) Mine Fujiko is great as well. Even better, the interaction between these and all the other characters is perfect, and propels the story well. Jigen isn't your typical brainless/comic sidekick. At one stage he tackles his 'boss' and threatens to break every bone in his body unless he explains what the hell is going on.
'Cagliostro' has some fantastic action sequences. Ironically (this really appealed to me) the car chase near the start of the film is more smoothly animated than the car sequence in 'Spirited Away', over 20 years later, whereas some of the _character_ animation is done on twos. I guess it comes down to how fast something needs to move.
Steven Speilberg, who is often credited with calling this 'one of the greatest adventure movies of all time', was actually credited with a different quote on the cover of the Australian release VHS I watched back in the 90's. He was quoted as saying it contained 'the greatest car chase ever filmed'. That's a bit over the top. If he said that, he obviously hadn't seen 'The Burglars' with Omar Sharif, but let's just say that this film probably did for Fiat 'Bambino' 500's what 'The Italian Job' did for Minis.
Some of Lupin's roof-top acrobatics are truly breathtaking, and since it's a Miyazaki film, there's the obligatory aerial sequences - this time in a gyrocopter - an obvious nod to 'Little Nellie' in 007's 'You Only Live Twice'.
I can't think of anything bad to say about this film. I guess it could have been more perfect, but with a rating of 9 out of 10, this one belongs in your collection, even if your not an animation fan. A classic, as well as an obvious influence (IMO anyway) on 'Cowboy Bebop'. If you want a point of reference from within Miyazaki's later work, the only Ghibli film this remotely reminds me of is 'Porco Rosso'.
(*) he was nescessary to the story in the sense that he was part of Lupin's gang from the TV series, but he doesn't really contribute anything much to the movie.