Didn't really look into the website, but seems legit. Google is your best friend: Free sheet music on 8notes.com
Hi there Well there are many websites which shows that they have good contents for beginner and amateur musicians, but once you begin to visit these sites, you will find that many of them are thinly disguised search portals with broken links or front-ends to lure you into purchasing something related to music. So I have personally researched for good sheet music website and found musicforte.com to be the good source whether it is piano, guitar or other instruments. Many people find this sites useful where you can learn the arrangements, print out the music and get notations that you want.