If you're interested in SW3, you've probably heard this a hundred times already, so I'm gonna focus on the individual things I like about this game. Please keep in mind that I haven't played SW1 or 2 and only bought this game because people drew Arena Shooter comparisons:
The enemies are interesting and varied, the hitboxes feel fair
The guns are also varied, unique and feel amazing, especially the shotgun with all its upgrades
The game is beautiful and runs at 80fps on high settings and 160fps on low settings on my 1660 super
The gore and the finishers look good, although some finisher animations are a bit too long for my taste
I didn't really like the grappling hook at first and felt it to be a little clunky. I still feel like it could've been smoother, but I got used to it and kinda like it now, especially for pulling yourself towards enemies and pulling barrels towards you
The arena designs are fine, nothing too noteworthy here
The gore weapons are a great idea! Although i find myself to always use the same two or three, and often I don't use them at all because of the amazing weapons
The humour is fine, mostly. Some oneliners actually made me laugh and I like the popculture references
Movement feels great! The slide and dash mechanic feel fluid and mastering them gives you a lot of mobility in the arenas, although I kinda wish you could slide sidewards and backwards
I also like the 1hp system, where a fatal hit sets you to one hp and gives you a last chance to recover. Doom Eternal also had this, but it's more clearly communicated here and it mostly prevents "♥♥♥♥♥♥♥♥ deaths" in my experience and does not take away difficulty
The sword feels amazing and I find regaining ammo to be really fun and fluid here!

Some of the things I didn't like:
The platforming. In Doom Eternal it wasn't amazing either, but at least you could fly by or even "skip" most of it after you mastered the movement (and speedrunner strats hehe, thank you Raitro). In SW3 everything feels very "scripted" and by the end of the campaign it gets really stale
The boss fights, especially the first one, are kinda lame
The bugs. I played through the "Dragon Nest Village" Survival Map three times on Hard difficutly, and every time it didn't finish although I played through all rounds and waves. Very frustrating. Also a lot of platform edges feel kinda ♥♥♥♥ and you just fall off the map where you expected to climb. In arenas with multiple vertical layers, large enemies often get stuck in between them
The sensitivity settings. I have to go down to 800 dpi (usually 1600) and use the lowest possible sens, and that's already ~22cm/360 on 130 FOV (30cm on 90 FOV). What the ♥♥♥♥? A lot of shooters don't have up-to-date sens scales, and this is on of them
I can't map multiple keys to the same action. With all the walking and platforming in the campaign, I like to also bind the slide to the mouse so my pinky can chill a bit. Not possible here
I didn't care for the story at all, which isn't really a valid critique as I don't know the other games. Cut scenes look good though.

Overall a great game if you like the genre. As a Doom, Quake and Devil Daggers/Hyper Demon player I felt like I "mastered" it pretty quickly. Played through the campaign twice, once on Hard and once on Hardcore (which is actually gonna kick your ass!) and basically only play the survival mode now to focus on the combat loop. I wish it had more than three maps, but it's gonna last another 10-15 hours for me probably. I recommend buying it on sale

7.5-8/10

great movement and gun-play. this is a must play

A visually appealing completely half A**ed game. There's nothing wrong with copy-pasting to make a fun FPS game, not everything has to reinvent the wheel but this is the worst mix of Doom Eternal & Borderlands. This mess of game is all visuals with repetitive poor quality voice lines, too many cut scenes, poor mechanics and bad designs choices.

You'll be spending most of the time reloading and switching weapons(you can hold about 4 bullets for each gun) while falling through floors, dying from enemies spawning inside of you, getting caught on gibs in undersized arenas where even the enemies are stuck on one another while they shoot through walls at you.

It feels like all the money was spent on character design for it to look like a AAA in the trailer but plays worse than most single A indie games.