Ranked in these QuestionsQuestion Ranking
Pro Helps users learn thousands of words in a short amount of time
Con Not enough variety
Words are learned only through fill-in-the-blank style problems. The user is not challenged enough to be able to remember and use the learned words in circumstances different from the fill-in-the-blank sentences.
Con Only a few languages available
Currently only offers English and French. The website says there are 6 other languages in the works.