I've heard good things about it so far from regular Joe gamers. Haven't downloaded it yet, but I hear it plays real smooth and fast game play like th home consoles with the latest iPhones and Androids and it's a good contender vs PUBG.
Edit: here's one review so far
www.bgr.in/gaming/call-of-duty-mobile-review-finally-a-true-contender-to-pubg-mobile/amp/
Couldn't find it on metacritic from a Google search.
Also, sadly I think it's a real missed opportunity we didn't get this on the Switch. Activision must be allergic to money. Would have been great and filled the itch for shooters on it.