This is the biggest piece of furniture (so far) we bought from Ikea - 202cm tall, not to mention very heavy too. It has 3 colors, I picked white to match with my white computer desk.
I think I'm not only in love with Ikea furnitures, I'm addicted to fix my own furnitures too!
I like it big, simple and flexible, the shelves in between are adjustable to different heights to fit files, magazines and books of different sizes.
Another thing I like about it is the nice curve fitting at the bottom of the shelf, which allow it to 'lean' against the wall without a little gap.
We weren't aware of this when we saw the display set and we thought it was a defect when we took out the pieces of planks from the box :p
It's not only a book shelf, it can be an elegant display cabinet when glass doors are fixed to it. Thinking of getting another one to be placed beside it :)