Can anyone tell me how well these knives hold an edge? Is this a suitable hunting knife or better as a survival knife?
I've always been pretty happy with the Moras' edge holding. There are more expensive steels that hold an edge longer, but the tradeoff is they're harder to sharpen. It's pretty easy to get a working edge back on a Mora in the field.
Moras are quite suitable as hunting knives. I much prefer the polypro handles for slippery work, and IMO they're sturdier as well.
As for a "survival knife," that depends what you mean. Moras are built as cutting tools, and darn good ones for the money. If you plan to do a lot of prying and digging and massive abuse, though, Moras may not be for you. Though because they are inexpensive and light, you could easily carry two.