Mixed reviews. There's one negative review in the 3, but there's a number of 8/9s to counteract. Looks like generally middling feedback.
From what I can tell, if you're expecting Diablo with guns you'll be disappointed - the story is weak and the RPG elements light. To get the most out of it, you probably need to be playing it with friends as a co-op twin stick shooter where you just tear through the levels.
Best thing is that those of us with gamepass can try for free without needing to purchase. Me and some mates have got it preloaded ready to try tonight.