It must be easy because I managed to do it without screwing anything up. I thought the same thing about the El Kameleon faces so I did not get one.
Crutchfield - if you plan to buy at least $200 from them ask somebody on here for a referral code so you and they can save $20 each. They tend to be a little more expensive than other places on the net but I have heard good things about their customer service and if you have the premium sound they are the only place I know of for sure that will be able to get you the right bypass harness(make sure you call them about it if you have it).
When I was looking I ended up with a pioneer stereo because that was what I liked best of what I saw(I wanted something fairly plain loooking).