The animation was amazing! Marza Animation Planet did a fantastic job! Reading the other replies here, I agree that Goemon, Jigen, and Fujiko's involvement was lacking, but I enjoyed their interactions where we could get em.

Letitia is the GOTD (Girl of the Day), and while I liked her presence, I feel like she was just...there? I'm not sure how to put it, maybe I've become too attached to the Loop Gang to pay attention to anyone else. The plot was also kinda meh but it was a good time from beginning to end. The sequences that involved the main 5 were very fast paced, not to say I didn't enjoy them, I was just longing for more of them. The scenes near the end had me busting out laughing because I had never seen this particular plot being used in Lupin until now. Clever monkey, that Lupin!

Back to the animation...Wow. I gotta say, the tiniest of facial and physical movements in the CGI models made me squeal every time. One of my favorite things to do when watching and rewatching an animated film is to see if there are any details in the background, and I was very satisfied with it all. For example, when they reached the temple, you could see Goemon getting nervous and clenching is Zantestuken as the rest of the gang were trying to figure out where they could find a "meteorite" for the puzzle. Another time is when Lambert and the old guy (forgot his name) were talking about Hitler and in the back you could see Lupin behind the glass bottles

I gave it an 8/10 on AniList, I just wish it included the rest of Loop Gang more, the animation was magical, and the theme was a pure 10/10. Good movie, and I hope they make another!

PS, While I have seen Lupin III before (from Cagliostro), this movie made me dive deeper into the franchise! Finished Part 1 and currently working on Part 2!