If the goal of a free set of quickstart rules is to get you to purchase the full edition than this set is Mission Accomplished!
Basically as soon as I was done reading this I purchased the full rulebook and Feral Hogs scenario and my group was off to the races.
The Modern AGE rules themselves are fairly simple and straightforward and my group was able to pick them up immediately with very little learning curve. I've only run one adventure using these rules so far but my whole group's immediate response was "when can we play again?" so that's the most reliable metric I have to indicate a gme is good.
For $0 if you're interested in a modern RPG that anyone can play and learn you can't afford not to get this.