Based on the users' reviews, here are the pros and cons of the app: **Pros:** 1. **Easy to follow**: Step-by-step lessons and clear notation make learning blues guitar licks accessible. 2. **Variety of styles**: The app covers various styles, from basic to advanced, catering to different skill levels. 3. **Effective practice tool**: The slow practice mode and looping feature help solidify new skills. **Cons:** 1. **Some inconsistencies**: Users reported minor issues with video display and lesson navigation. 2. **Too much repetition**: Some reviewers found the same licks repeated excessively, lacking variety. 3. **Lack of teacher feedback**: Users miss a sense of guidance and personalized feedback from a teacher. Please note that these conclusions are based on the reviews available on the App Store at the time of my knowledge cutoff, and may change over time.