Verified answer

Pros -

It's the same system you'd build yourself, but you don't have to put everything together and it's all covered under one warranty.

Nice looking cases.

Comes pre-configured for the best performance from the components installed possible.

Cons -

Expensive, to the point where you could build twice the system for half the cost.

Alienware computers run Windows OS and anything Linux-based. The Pros are that they will run any video game or program at optimum speeds, and usually give the best performance out of almost all computer companies. The only con is that they are insanely expensive. Remember, Alienware is a Gaming Computer company. I would only recommend it if you are very into computer gaming.

Alienware:

Pro:

Fast

Good Cable organization

Good cooling

Cons:

Expensive as all hell

Basically the same components you could get for much less money, which pretty much makes the fast point moot.

Pros:

Cool design

Good performance

Cons:

Expensive like hell, you can get the same component using much less money.