I have the Xbox 360 version of AC1, but the PC version is so worth it! It runs much more smoothly on my computer, has awesome graphics, and I have a controller that's constructed like an Xbox 360 controller, so I can play it like I can on the Xbox!

I think I might sell my Xbox 360 AC1. Maybe...

It is a good game, but I can buy the retail version at amazon way much cheaper than here at gog.
Thats kind of annoing, as the game here is all digital and not a retail version.

it should be at least 5$ cheaper than now.

Except that from GOG you get: a manual, 9 wallpapers, complete and offical soundtrack, 16 avatars, 19 artworks and an artbook. But if you don't think that's worth a fiver then by all means, buy it from Amazon. No one here is going to stop you.