This website is a safe, reliable resource for LEGAL and free classical sheet music. All scores are in the PUBLIC DOMAIN and it is simply a website that categorizes countless scores and offers them for easy downloads. Additionally, it warns that copyright rules are different based on county, furthering its credibility.
One of the GREAT resources of the internet for classical music lovers. Thousands of scores that are in the public domain can be downloaded for free.
Very conservative regarding what is in the public domain, and they seem to prefer to err on the side of caution. It can be frustrating to find that a score that is in the public domain is barred from the site, but that is a minor gripe compared to the wealth of music freely available.