Library Thing is very easy to use, however, the design of the site is very basic to me. It looks and feels just like a developer created it and doesn't have much of a warm friendly feeling to the site. I wish you were able to add more than one book at a time after completing a search. However, the searches were quick and easy to use so I can't say it is a huge complaint more of a usability request. It is very nice to be able to tag, and have access to others catalogs with similar tastes. It is especially helpful when looking for a genre of books.