Review (3/5): It's okay if you have a short mustache
As another reviewer noted, it's mostly pine rosin and smells of it as well. The scent overall is like pine wood and wax, a la a candle. Not great, not bad. I do find it makes my mustache look more voluminous, which is nice as the hairs are relatively light so it looks sparse at times, especially when not styled.
Application is difficult to say the least. The first few times I put it on, I tried so hard to warm it between my fingers without much success. Fortunately, my apartment at the time of review has radiator heaters. I set it on the radiator before I shower, and when I get done it's a liquid in the tin which is then extremely easy to apply. Surely one could achieve the same thing with a hair dryer. Worth noting - apply liberally if you want a good hold - but I wouldn't recommend a liberal application if it's not liquid, as you will be pulling some hairs out.
I personally am presently rocking something between a chevron and just natural 'stache. Pretty short in the world of mustaches, but when applied as noted above, as a hot (not scalding) liquid, it holds my mustache well enough to keep it out of my mouth. Though, the hold doesn't last for more than a few hours especially if you are eating or drinking something. I'll probably use it up and switch to another product.