DepthThis is 'content' richness. How comprehensive is The Everyday Language Learner's Guide To Getting Started and does it take you far in terms of levels, or is it more suited to low level/tourist learners?
UniquenessIs The Everyday Language Learner's Guide To Getting Started innovative or is it just an imitation? Does it have a unique selling proposition (USP) that makes it stand out among competitors?
QualityOverall product quality indicator that covers everything from video/dialogue clarity, authenticity, explanations, and effectiveness.
CostIs The Everyday Language Learner's Guide To Getting Started acceptably priced and how does its pricing compare to market competition?