I've had a chance to play it once, as a demo game. I'm so impressed that I'm going to ask for it for my Christmas

Is it any good? - Hell yeah! Captured the feel of spies very well. Although tbh I imagine it can be usedto cover a variety of settings... I already know what I'll be using it for.
How quick is it to learn & Play? There are a lot of rules and special abilities, counters and charts. At first glace it seems very complicated... but you pick it up real easy and the rules are relatively simple.
any System Quirks? Yeah a few. I quite like them though. Some people may call the activation a 'quirk'... I really like it but I know not everyone will. IIRC Basically each round you can activate half of your force, plus some additional models if you choose to activate your leader. Movement is also very fast- by using the double move action you can actually move about half the board! Also the ability to Shoot and then charge into hand to hand is a bit unusual.
Hope this helps
Cheers
Andy