Pros: unbeatable price, sounds great and loud as!
Cons: supplied hose useless, only good for an aquarium pump. You have to buy stronger hoses from somewhere else. Compressor is loud if you have in anywhere except in a soundproof boot/trunk. Only buy if you or your mate is an auto-electrician otherwise fitting is expensive as you can't just wire it straight in without risking burning out your electrical system.
I bought it as a gift for a mate, cost him around $700 AUD for installation plus extra hoses switches etc.
If none of this bothers you though definitely buy it, it's awesome dude!