The game uses a template-based system for movement (similar to X-Wing) and a rather ingenious way to simulate speed, with cars in higher gear getting to move more often in a turn. The rules are simple and straightforward, aided by an over-arching "rule of carnage" that states that if any rule is unclear or open to multiple interpretations, always go with the option that does the most damage.
The simple rules make it a fast-paced game, which is what you want from a game about speeding cars. Each round is split up into "gear phases" in which cars moving at that gear or higher get to move and then attack (either by ramming or shooting). Going faster gets your vehicle more chances to act, but it also reduces your choice of movement template, which could see your car unexpectedly careening into a bit of terrain, or even off the board all together.
Players are presented with a number of options for creating their cars, including different types of vehicles such as buggies, motorcycles, performance cars, pickup trucks, and even the dreaded War Rig. Cars are then festooned with armaments ranging from basic machine guns to land mines and oil slick sprayers. There is even one faction armed with mad science lighning projectors and EMP pulses, and another that uses jury-rigged catapults to lob bits of junk at their enemies.
One of my criticisms of Ronin was the lack of accessories such as stat cards, but that's less of an issue with Gaslands, mainly because the game is a lot more popular and there are numerous online resources providing everything from plastic movement templates and custom engraved dice to reusable blank vehicle cards.
Rating: 5 (out of 5) A terrific high-octane vehicle combat game. It may take a bit of prep time if you want to create custom cars to play with, but that really is half the fun (at least).