I spent a lot of time reading reviews and watching videos of this saw as well as the Silky saws. I decided to get the Sven, and I took it on a camping trip. To my surprise and glee, my buddy brought a Silky BigBoy with him, so we were able to test both.The first thing I processed with the Sven was a 4" dry Cedar. I was very happy. Like butter.I then tried the Silky, and it took maybe 50% more effort - still great, don't get me wrong, but I was very pleased with my Sven decision.The next thing we processed was a dead but still sappy 4" White Pine. This was harder for the Sven. The Silky was nicer.I did hear that during my research, that the Silky is better for fresh(er) wood. It's a different blade/tooth configuration. I would definitely say this is true, and I urge you to take that into account when choosing.The BigBoy doesn't stay closed when you close it, and it's slightly heavier and slightly girthier than the Sven. Also, the fresher wood obviously doesn't burn as nicely, so I personally decided to stick with my new Sven - I'd rather look for dryer stuff than deal with a cold fire. But, if you're looking to cut something other than firewood you might prefer the Silky. To be fair, I'm talking sappy softwoodwood. I didn't try a live hardwood, for example.I much prefer the holding angle with the Sven. It's just like what you're used to with a bow. The straght/folding design isn't to my liking, although I think with a longer stroke like on the KatanaBoy it might be less of an issue (and better for certain angles of attack). Though, I'm not sure I'd want to bring that beast out with me for campfire building. But I'd rather use that to build a lean-to or something since that would likely involve more live wood.Back to the Sven. The one thing I could see happening - you lose the wingnut. They are kind enough to include a spare, so just bring that with you. You could also take a really small drill bit to the wingnut and attach a thin wire so it's harder to lose (see Tim's review).I would recommend this larger 21" over the 15" - due to the triangle shape, you start losing stroke length as you go through, say, an 8" piece. So the 15" model really becomes like a 7 at some point. The 21 is still super light anyway, and it's really not that hard to strap it to your backpack due to how thin it is. I personally really appreciated the longer length.The blade is flexible, durable, and sharp. It's what a bow saw should be, but much nicer to pack. I feel good relying on it for warmth and sustenance out there. It's a great bow saw.I bought this to replace a Corona folding saw in my off-road SUV. I use this saw primarily to clear branches that block the trail or to cut up trees or limbs that have fallen across the trail and are too big to pull clear. Even if I use the winch, some things need to but cut up so they will fit into where I want to pull them. I don't have room to always carry a gas-powered chainsaw, but a fast hand saw works great for wet wood up to 6 inches and dry (dead) wood possibly 8 to 10 inches thick. Bigger than that, I probably don't need to bother it.My biggest reason for replacing the folding saw was that the particular one I had didn't sheild all the teeth of the curved blade within the wood handle. I didn't like the sharp saw teeth in my tool bag. A straight saw (with the handle in a straight line from the blade) doesn't give the best power, but this triangular design is the best of both worlds (folds straight, and opens to a large angle between the blade and handle).The disadvantage of a frame saw like this is that you can run into the limit of the frame cutting through a thick piece. A panel saw (whether fixed or folding handle) can keep going indefinitely. Still, there are some practical limits imposed by how hard I want to work and how thick a piece is going to be while still being narrow enough that my saw length will span it. I feel confident the 21" frame saw will meet my needs. While a considerably smaller panel saw with no frame in the way would also do very well, the folding design of the Sven's frame is such that it has the advantage in compactness. The length won't fit in a tool bag, but the very thin design fits neatly under the rear bench seat in my SUV along with my other long tools (a 48" Hi-Lift bar and handle, an 18" socket handle, and spare 5/8 wave VHF antenna).I added a washer between the wing-nut and saw handle. This provides a bearing surface for the wing nut which does not turn against the Aluminum handle.Portable Camp, Utility or backpacking saw. Very sharp!I love the Sven Saw. I've had one since I was a kid. They cut great, pack up small and are easy to use. They're just wonderful camping saws. I bought this one as a replacement for my Scout Troop.A note about the prior saw - if you use a Sven Saw long enough and hard enough, eventually the rectangular hole where the silver bar goes into the top of the red handle will wear to the point that you can no longer tighten the blade enough. But it took a LOT of very hard use to get to that point. Literally decades of use and abuse by generations of very inexperienced scouts before it finally had to be retired. Amazingly, the blade stayed sharp that entire time.Oddly, however, this particular company sent the saw disassembled. Specifically, the saw blade was not bolted or riveted to the silver bar and the carry cord was just stuffed in the package as a straight length of leather, not tied in a handle.I say "oddly" because the parts were still all nested together just like they are when assembled. So sending it disassembled didn't save any space or shipping over the assembled (but collapsed) configuration. And while assembly wasn't especially hard, I do have to admit that I only noticed the bolt they provided right as I was about to rivet two of the pieces together. I just don't understand why they shipped it disassembled.So five stars for the saw but one star off for this company's choice of delivery.I've had this saw for a few years now and love it for backpacking. It's a light saw and cut large wood great. It bent on a push stroke my fault so I hat to replace it. MEC stopped selling the 21 in so I was very happy that Amazon carried it.I have not cut anything with it yet. Goes together good and seems like it should work. I bought it for backpacking trips so I’ll know more this summer.These saws are dope, I use this and the smaller one. Great qualityTaglia molto bene, l'ingombro è minimo, cosa si può chiedere di più,I have yet to use it. But it is slim and trim and feels like it will last. It will strap on my bag easily. Cant wait to take it for a spin.