A game that manages to condense all the good stuff from Old School games- the random tables and monster lists- but loses the restrictive Level/Class mechanics. It's like RuneQuest, with the same gritty Sword & Sorcery vibe in the mechanics, but the game is a lot simpler to play or generate characters for.
It's written by someone who knows what was great about the historical period it's set in but treats that history as an inspiration rather than a limitation. The material inside lets each individual GM choose what balance of historical accuracy and fantasy they want. You could go entirely one way or the other using the same rules.
The single best thing about this game, though, is the combat system. The fact that every single review about the game or AD43 (which uses the same rules) mentions it should clue you in to that. It's a simple "Both roll 2d6 plus bonuses and compare" system that's pretty much the same as the old Fighting Fantasy books at the core. But a few key tweaks to that system have transformed it into something truly inspired, where tactical decisions are important and life or death depends on the three factors of individual prowess, the weapons being used and the armour being worn.
Not only is this a great game in itself, but it's one that would be easy to adapt to any other Bronze or Iron Age setting. Whether you've got a favourite period of history or a particular Myth-cycle you feel like playing, this could be easily used to run these games. Not just obvious similar ones- the Trojan War or the Roman Republic, for instance- but I've had thoughts on running both Viking and Aztec themed games with it. Or for just about any Sword & Sorcery fantasy setting.
My only complaint about this game is that it doesn't have the option to buy a combination PDF & Print On Demand bundle.