Hi Anssi,
I just purchased the same link for my 06,(what a hassle to get here in Canada cause no one here carries them, and PC does not ship out of the US).
My main reason for it was to lower the bike because my legs are short, and i was tired of dumping my bike when i stopped. It lowered the bike about 10mm, which is better than nothing i guess.
It definitely changed the way the bike handles for me, i am an average rider that is not overly aggresive. I noticed that it stiffens up the last half of the shock travel very well.
I'm a little heavier than you, and i found the stock springs on front and back for me too soft, I went 2 sizes stiffer on the back, and 1 size stiffer on the front, and now it handles much better for me.