>>217359210The anime, content-wise, has been mostly entirely faithful and the first two episodes had some good anime-original content added.
The biggest fuckups/inconsistencies have been character abilities and power levels. Megumi can't shrug off being punched through several concrete buildings. Nobara's nails don't slowly dig into the target and then explode when using Hairpin.
They also cut out the narration, or had the narrated lines said/thought by some character, which was very awkward at times.
The direction, choreography, and animation can be very hit or miss with a couple very nice peaks and some very unappealing weightless floaty cuts, although some of these are just down to personal preference.
The official english subs stayed true to JJK tradition and have some really bad mistranslations and confusing wording, as well.