As a late contribution that wasn’t quite finished on open data day, here’s an alternative perspective on the comments for each computer category.
These network diagrams show the words that most frequently appear in the comments and how often they appear in the same comments (the width of the lines). So you can ‘read’ the most common phrases by following the thicker lines:
Laptops
Tablets
Desktop (dog?)
As with the earlier text analysis, with thanks to Quanteda