Eh I wasn't really a fan of this. 6/10 for me.
The primary downside for me was the story/plot. I just felt like the entire story could've been about something more interesting and compelling, rather than constant cutaways to "the real world" outside of a video game world, none of which was very interesting honestly.
I agree it probably is the best movie about video games made to date, but at the same time, it really feels like the vast majority of movies that have been made so far either based on games or about games have yet to crack the code of what these movies should actually be. And it's starting to really show that these filmmakers, no matter which movie it's been (whether this one, Sonic, Wreck It Ralph, Ready Player One, et al), don't really understand video games on a fundamental level and have probably never actually played a modern game (post-2005 era). All of these movies are trying to mish-mash ideas from disparate games into stories that just come out as either convoluted or just not interesting, IMO.
Honestly the best part of the movie to me was Ryan Reynolds, and not because of his signature humor either, but more because of what his character became as the movie progressed. And to its credit, it did have very inventive visuals, and it's also worth seeing in 3D.
The movie really didn't need any of the plot that happened in the real world. If it had focused entirely on the video game world, it would've been so much better. It felt like this movie tried to be two things (partially about the gaming business, and partially about a hypothetical video game world) and ultimately failed at delivering either, IMO. The "gaming business" side of the movie felt really out of touch too.
To me I'd sum up the movie as made by a director who probably knows a fair amount about video games but doesn't really understand them or the business.
Also for a movie that had Ryan Reynolds, it took absolutely no advantage of that fact at all (no meta references to Deadpool, and the PG-13 rating limiting his signature humor). His part could've easily been played by someone else. And Taika Waititi might be a talented director, but I don't think he should ever be allowed in front of a camera again.