The Fuma Conspiracy is a good time filled with action, reality-bending physics and characters, but it's what fans of the Lupin the Third franchise have come to expect, know and love about it.
This is a very watchable OVA and a good Lupin story, though it's probably not for people unfamiliar with the characters of the franchise. You need prior knowledge to fully appreciate this film. While that may seem like it degrades from the experience, it really doesn't degrade the quality of the film itself. Maybe someone out there's seen this without having known any Lupin III media and became a fan from Fuma. Well I'm one of those fans whose love grew from The Castle of Cagliostro.
Fuma has all the good stuff from the anime icon, and it's exactly that. There's action, humour, and the cat and mouse chase between Zenigata and Lupin. A routine that's entertaining when done well.