windows 7 ultimate activation keys, illegal or genuine?

I want to get my computer upgrade to windows 7 ultimate, Then I search windows 7 key in the google and find the http://www.windowskeyshop.com/ , I just wanna to know does they provide genuine windows 7 keys? Looking forward to more details, many thanks!

I would highly advise against getting a product key from that place. Too many problems and highly suspect.

For what reason do you need Ultimate and what version do you have now? You can do the "Anytime Upgrade" available in the Properties section of Computer (right-click).

Buy it from Microsoft or Amazon
It is a little too late to buy windows 7 because Microsoft will release Windows 8 in October 2012 which is just 3 months from now. You definitely can wait 3 more months