Craig Norrie’s review published on Letterboxd:
Everything technical about this movie is great; it looks great, the music is great and the acting is top notch but this isn't Tarantinos best work. Thats not to say it isn't good its just a bit overly long for the sake of it.
Everything with Leo and Brad is great, with both giving amazing performances but this is the first time in a Tarantino movie where I've actually FELT the runtime. There are long takes that you could take out to tighten things up and I understand WHY she was in the movie but everything with Sharon Tate could be removed and it would actually make the ending (which is already hillariously awesome) better, as it would add a "holy sh*t" zing to what has happened.
This probably would have worked better as a miniseries on Netflix or Prime so I'd say to wait till this is on one of them or home release as it is worth watching, especially for Brad & Leo, who have great chemistry, and the ending. But its a bit of a chore to sit through in the cinema (and this is coming from someone who loved Apocalypse Nows Final Cut in the cinema).