For 10 bucks, I'd say it's worth it if you're into the setting (you're here, you obviously are) and enjoy Diablo-like ARPGs. The camera controls took me a bit to get used to. I haven't touched it in quite some time, but the game seems to have made some improvements over the years.
On topic of WH40K video games, I finally got a chance to play Darktide now that it's available on Game Pass. From what I've seen, I picked up good time to experience it fresh since the recent skill tree patch added a bit of variety into playstyles, along with a lot of weapon tweaks for the better.
I've gotta say, the environments and the atmosphere of Darktide are top-notch. The scale of the background imagery (especially the forge worlds, my god) feels appropriate and honestly are just a beauty to stop and look at. The soundtrack is also a banger.
https://youtube.com/watch?v=ZnOREzwYYP0
I wish there were more decent WH40K games. WH40K has an autisticly large pool of lore to get inspirations from that aren't Ultramarines and it should be capitalized on more.