I have a Case Sodbuster Jr in stainless. No problems with it. Sharp as the dickens. Holds an edge.
Have an old beat-up large sodbuster as well. I've just about got the edge where it ought to be, and it works just fine. Cuts well, holds its edge. Spent an evening hacking up boxes with it. Had to touch it up mid job, and again when I was done. Hardly surprising, as cardboard is tough stuff.
I also have a new Peanut (bone stag) in stainless. Even sharper. No touch-up required so far. Think I may get another.
I have the two-bladed folding hunter in stainless. Very sharp out of the box. Hasn't seen much use yet, so I can't speak to durability, but if it follows the others it'll be fine.
Frankly, I like the blade quality of my CV blades more, but I'm not unhappy with any of the stainless blades.