I am giving this 5 stars as a free primer to a new game, so i don't expect it to have everything for everyone, just to give the flavor of the full game. Which this does.
PowerFrame has a simple resolution system (1d6 + mods), character generation looks quick with a lot of options, and the combat system looks fairly light but with a number of tactical options and some crunch to spice it up.
I really like what I see of the wilderness travel system, and that alone might be enough for me to buy the main rules.
Layout wise, the primer is clean and attractive, with a mangi-ish art style that gives the game a bit of a light, almost animation feel.