The 10-lesson (5 CDs) Basic Course gives customers the chance to test drive the incredibly effective and efficient, world-famous Pimsleur Comprehensive Program. A real try it before you buy it deal. Customers will love the experience of acquiring the essential grammar and vocabulary of Russian, during the spoken practice sessions. It is this ease of language acquisition that makes the full Comprehensive Pimsleur Program so popular and successful for adult language learners.