The rules in this PDF are a great summary of the excellent Conan 2d20 system. If you have purchased the main book this quickstart is invaluable as a quick reference to counter the bloated verbiage of the core book.
Play is fast, combat is perilous. The system offers tactical choices to the players in combat and out. Stress and Harm are a wonderful mechanic. Momentum gained from excess player successes is a great currency for the players to spend. Doom, the GM's analog, is a bit harder to manage but does add some crunch to GM fiats.
The scenario is thin - I've actually run this same story (lifted from the Howard's "Beyond the Black River") several times before with other rules and I think the scenario authors missed some great opportunities. That said, it has all the materials you need to extend the scenario, so go read the original short story and use your imagination to fill it out.
Frankly, I think 90% of the value of the system is contained in this PDF. You will want the main book if you intend to play a campaign, as it contains character creation, a small bestiary, a vague magic system and some equipment tables. During play, though, this quickstart is far more useful than the main book.
[5 of 5 Stars!]