Ritter's Pocket Saw review I've had one of these in my hunting pack for quite a while. I can take down lodgepoles in about 1/3 the time with these than I can with any axe or hatchet, using the latter to trim branches etc instead.
A pocket saw, properly used, is more ergonomic and less strenous/exerting than swinging an axe on any sort of cross grain cutting. Axes work good on splitting grain, which you get at branch junctions and splitting rounds. A good sharp axe will chip cross grain, but not as efficiently as the chain saw does.
BTW, you could always make your own from a motorized chainsaw chain, just pop the links and alternate the cutting teeth in opposite directions. I think that is how the Saber chain saw is done anyways.
My only complaint with the pocket saw was when I was learning how to use it and would roll a loop into the chain and have it bind. I quickly learned how to avoid that mistake.