I love it!
I've known it existed for ages, and presumably dismissed it, including when on sale. I picked it up in a recent weekly sale on a whim, and I'm glad I did.
I find there is something charming about the graphics, it reminds me of 90's prerendered 3D sprites or something, and has some cute item physics and corpse ragdoll.
Sound effects are adequate, although the small amount of music quickly led me to turning it off.
The mobile version is also surprisingly good and controls well, and you can play the first few levels for free if you insist on trying it before you buy.
But the most important thing is the gameplay, randomisation and discovery, and that's where it shines as a true rogue-like. At first you have no idea how to deal with all the different items, but with each run you learn a bit more, and discover a little more of the hidden attributes, details and interactions. Sometimes I find this kind of hidden information frustrating, but so far in WazHack the discovery and new possibilities you learn has been really fun.
I'm informed that WazHack takes a lot of inspiration from NetHack, and while I've played various rogue-likes, and a lot of Angband (which I finally beat recently), I never really played NetHack. I like WazHack enough that I'm thinking I probably should have played NetHack more, but for now I expect to enjoy a lot more hours in WazHack.