Depth This is 'content' richness. How comprehensive is News In Slow Spanish and does it take you far in terms of levels, or is it more suited to low level/tourist learners?
Uniqueness Is News In Slow Spanish 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 News In Slow Spanish acceptably priced and how does its pricing compare to market competition?