Chainsaw Man Recap

Much better than the original. Not only did things get sped up and tone changed to align with the manga, the timing and music has changed completely in some crucial scenes, resulting in a vast improvement from the slow, pretentious, vapid directing of the original anime.

Instead of feeling like I'm watching some B grade movie that takes itself too seriously, it finally has some of that crazy zaniness that made the manga so adored by fans all over the world in the first place.

It's not perfect (since this is still a recap of the original anime), but it makes me hopeful for the upcoming ... movie.

If it was up to me, I would had changed the voice actor for Denji too. His voice is still too serious and solemn for the type of fun, wacky character that Denji is supposed to be. But I definitely the VA made an effort to improve from the original (eg inserting maniacal laughter during the fight scenes).

Another issue is that they are still using the original soundtrack which again is too serious for the vibe of the anime.

But overall I love that they tried to salvage the original anime as best they could.

Chainsaw Man Recap is just a Recap.

MAPPA just cut every episode together cut out the OP/ED and released it (+"Chainsaw Days")

CSM Recap has 1 OP (KICK BACK, just the old one) and 2 ED (Chainsaw Blood, Fighting Song, also the old Ones)
they didn't add new music or OP/ED and cut out 10 from 12 endings, and the unique ED in ever Episode was one of the
best Parts in the Anime and they didn't add those.

The only new thing to CSM Recap is "Chainsaw Days" (Bonus Content add the end of every episode)
and they are good or at least fine, i find them kinda ... funny or interesting.

And to the question of should you watch it,
NO, as long as you watch the anime you are good to go
the only thing that would be new to you is "Chainsaw Days" and they are fine.

While I feel that the recap is perfectly fine in itself, hence I gave it a score of 6/10, I can't recommend taking the time to watch it if you aren't a completionist and/or you don't need to refresh your memory. Even then, the recap takes a short 12-episodes series with a total runtime of ~5 hours and compiles it into two long movies, clocking in at around ~3.5 hours... For roughly an hour or two's difference, if you need a refresher, I'd suggest just rewatching the series at that rate.

While it includes extra gag material, it is conveniently all added post-credits, so you can ... really skip the whole recap and just watch them at the end, if you just want to see what's new. Honestly, since the series itself is short enough to be re-watchable before the movie, then (if I were in charge) I would have just published "Chainsaw Days" as teaser shorts instead.