I have the Mora Garberg, Kansbol, Heavy Duty Companion, Mora Chisel Knife, Mora hook knife, a classic carving blank I handled myself with wild black cherry and several Companions in both stainless and high carbon.
My go-to favorite is the good old standard Companion. The shape and thickness of the blade is perfect for me. The Garberg and Heavy Duty are good, but I find the thickness of the blade makes fine carving difficult, at least for some of the cuts I make when carving spoons. The small 3" classic carving Mora knife is good for carving, but too small for general chores, butchering or food prep. The Kansbol is cool, I mostly just keep it in my truck.
I have field dressed deer with my Buck 110 Hunter and I think the Mora Companion, with its non-slip grip, would work even better especially when one's hands are slippery with blood. My daughter raised meat rabbits for 4H for years so I got a ton of butchering time in using my Mora Companion and a Schrade Sharpfinger. Both worked well. I also used the Companion for thinning hides when we tried tanning a few. It worked fairly well, though it isn't designed as a skinner with an upswept belly so you have to be very careful the tip doesn't pierce the hide when thinning it.
I've used the Companion and the Sharpfinger both for scaling and cutting up bluegill that my daughter and I have caught too. I always take a file and square off the spine of the Companions so they have a good sharp 90⁰ angle for striking ferro rods. This also makes the back of the blade good for scraping scales off of bluegills too.
I have used the Companion for splitting small pieces of soft wood like pine for making fire lays and once had to use my Heavy Duty Companion to dig a hole. It dulled the blade up, but didn't cause any severe damage that I couldn't easily fix when I got home and brought it back to a razor-sharp edge. The Companion has always been great as a lightweight bushcrafting knife, but for longer term survival when my life is on the line it's not my first choice.
I usually sharpen my Companions on regular bench stones finishing with a translucent pink then stopping with rough out leather impregnated with emery compound then smooth out leather rubbed with jewelers rouge. After stropping I hit a knife steel about 10 times per side then about another 10 times lightly on the fine strop then a wipedown with food grade mineral oil. I got some lint-free flannel cloths in the auto detailing section of the hardware store, 3 large cloths for $5. One of them I drizzled very lightly with mineral oil and keep it in a zip lock bag for wiping down carbon blades that I use for food prep. I have a Ken Onion Work Sharp with the blade grinding attachment and occasionally I use that on the Moras too.
Also, I usually force a patina on my carbon Companions. I have used mustard, salsa, potatoes, limes and Birchwood Casey Superblue. I like the look of the blackened and polished steel and I think the patina holds oil better as well as providing its own level of corrosion resistance.
The price of Companions is such a high value I have given them away at times as gifts. Once I even traded one for a haircut when I was broke and needed a haircut for a job interview. I love Morakniv so much for putting out such a high quality product with such a high value price. I will always be loyal to Morakniv because I feel like they genuinely care about their livelihood, their passion, their knifes and their customers.
As a student of the martial art Hwarang Do I have had some training in knife fighting techniques and I believe the Mora Companion would make a competent defensive blade but only if it was kept razor sharp and best used for snap cutting.
As a martial blade I think the lack of a full tang and lack of double edge is a big handicap, not to mention the blade length is too short. For combat applications, stabbing with a double edged blade of sufficient length to penetrate to vital organs is often the most effective strike. Surprisingly, as related in "On Killing" by Lt Col Grossman, it is the thing most people have the greatest inherent resistance to doing.
In any case. The Companion blade is too short for reliable stabbing as an assailant could be wearing layers of winter clothing or heavy leather jackets, equipment straps or even a Kevlar vest or plate carrier. For a pure fighting knife I believe a full-tang double edged knife of at least 6" is best and the Companion falls short of that ideal. But as I previously stated, in a defensive role a razor sharp Companion will certainly get an attacker off you!
Very similar to a Schrade Sharpfinger in size and that is what Sonny Barger, founder of Hells Angels, was often fond of carrying. So for some styles of knife fighting the Companion would work well, if it held up to the abuse with it its partial tang. I would prefer the full tang Sharpfinger if I had to bet my life on one or the other.
That's about all I can think to say right now about the Mora Companion. Certainly an awesome knife, one of my all-time favorites, one I will always own and one that is literally at arm's reach of me right now as I write this. Keep 'em sharp!
WOW!! 
