Gameboy colours were the first modernisation of the classic gameboy.
A little lighter and a little more colourful than it's big brother - it's definitely the improved version of the classic gameboy.
There are a few downsides however. It can, like the original be a little hard to see what is going on sometimes and is best played using a light boy. It doesn't have the vibrant colour screen we've come to expect these days.
However, if like me you grew up with Famicon (Nes), Super Nes and Gameboy - it's great fun to be able to play classic games with the old AB buttons. No extra button, no distracting vibrations - just good ol' basic gaming.
Also, unlike some newer models, it fits easily in your hand and doesn't give you crampy hands when you play. (*cough* *gameboy advanced *cough*) As a grown up I definitely prefer this version above others.
So in conclusion - not too flashy but has plenty of retro charm. I'll be sticking with this!