4 was good. 5 was great. 6 was ok. 1, 2 and 3 sucked in such indescribable ways, especially after waiting over 15 years for them to come out. One of the most satisfying early youtube videos for me was this takedown of episode 1: https://www.youtube.com/playlist?list=PL5919C8DE6F720A2D It's so old that it had to be broken into 10 minute chunks because that was the limit on YouTube back then. There are similar takedowns of 2 and 3 by the same guy.

But then, it got worse and 7, 8 and 9 somehow made 1, 2 and 3 look reasonable, which still amazes me. I haven't watched 8 or 9, but if they can make 1, 2 and 3 look ok, they must be truly dreadful indeed.

But yea, 4 is basically a modern retelling of Kurasawa's classic The Hidden Fortress. Seriously, the plot is very similar, down to the perspective of the two lowest characters, which Lucas admitted he ripped from the movie. 5 was the real gem, in my view.