The European Library
Use 
Along with advanced search options (by collections and languages) providing a rich classification metadata structure, the portal benefits from a comprehensive help tutorial and a more intuitive approach, particularly for basic searching options.
Searchability 
While a basic search option is available in each collections'default list, users can also choose a specific collection and language search, always with effective results
Downloading
The research results provide mainly a rich classification metadata structure pointing to the record's final location, where the full text should be available
Navigational Aids
Some website and research tips are available along the webpages. A more comprehensive tutorial would be most helpful
User Friendliness
Being a growing metasearch engine, this portal is often not easy to use because of its complex organization. Especially the searching options for each collection's name or keyword are not so intuitive