Depth This is 'content' richness. How comprehensive is The Defense Language Institute and does it take you far in terms of levels, or is it more suited to low level/tourist learners?   
         Uniqueness Is The Defense Language Institute innovative or is it just an imitation? Does it have a unique selling proposition (USP) that makes it stand out among competitors?   
         Quality Overall product quality indicator that covers everything from video/dialogue clarity, authenticity, explanations, and effectiveness.   
         Cost Is The Defense Language Institute acceptably priced and how does its pricing compare to market competition?