It's by far and wide my favourite roleplaying game. EVER.
The first edition book if you can track it down (hint!) was one of the most complete "single tome" RPG books you'll ever find. Rules, careers, monsters, plots, maps, layouts, equipment, currency - everything in one book. It worked on d100 though which some people winged about (don't ask me why...). It was very bloody and my campaigns with it were very deep. Also, it is fully integrated with the epic Enemy Within Campaign - one of the best RPG campaigns ever written I feel. It also exposed the Warhammer world as it was at the time of writing - the Emperor was a weakling, the Counts held sway, the world was pre-Storm of Chaos (not that current GW even factors that in anymore!)
The second edition was slightly more accessible in terms of organization, it was full color, and broke the rules down into several books - still amazing value, though. The Empire was "updated" in light of the new fluff, with a centralization of power to the now "cool" Emperor and a different stat system.
I'd say grab both (if you know where to look!) and read both editions. You'll enjoy it, it's not a dungeon crawling exercise but was, depending on the skill of your GM, a deeply political, dark and very dangerous setting. Think Renaissance meets Holy Roman Empire meets hordes of dark fantasy monsters where things (including PCs) die. Often. Though slavery, drug addiction, random slaughter. A stabwound in the gut by a knife during a brawl in WFRP is a BIG deal. Like in real life. PCs are not immortal LVL such-and-such superdudes while everyone else is fodder. A pack of Orcs to the average Empire dweller spells almost certain death. Vast tracts of the Empire are completely uncivilized, travelling is a huge deal. With combat being so deadly and dangerous, the RPG element was exploded a thousand-fold.
It CAN focus too closely on the political "Chaos cultist" route if you're not careful as that's the underlying theme but you can have many, many, MANY adventures before the party is involved in any of that.
Great resources are available online, steer from the 3rd edition as you would from a pack of Skaven Plague Censers - they've watered it down, A LOT, to make it accessible to the newer generation. It's a card based-RPG-fast and accessible no-brainer of a game which, in all honesty, is well suited for its market I believe. Kids these days have often been denied the OPPORTUNITY to experience RPGing, thus buying a game in a box with a familiar presentation of cards, tokens (especially for the RPG elements of alignment and reactions, and careers) and skimpier writing offers them the possibility to access the game quickly.
Me, I suggest you delve into WFRP as it was originally designed, improved if streamlined in 2nd edition, and forget Fantasy Flight's new edition altogether UNLESS you're from the latter readership in which case yes, go for it. It's a pseudo-RPG in a box with big guidance built into the system to alleviate many's lack of time/imagination.
My two cents of the proverbial
punkskum@gmail.com
Steven