I was just thinking, in addition to the 5 star system and typed reviews, why not add some checkboxes for common positive and negative comments?  To keep it from being abused, maybe no more than 3 positive and 3 negative checks can be given.  Basically those checkboxes would be easier to fill out than a full comment and would provide the merchants/artists a quick glance at what people specifically like about them or where they need to improve as well as allow buyers to get a better idea of the pluses and minuses of store items.

A lot of people (myself included at times) don't always want to take the time to leave a full review as I was hoping that the checkboxes might provide a quick and slightly more detailed response than 5 stars and a plus one comment.

Thanks for the suggestion WC, it's a good one. I'll add it to the list and also bring it up to the MP staff :)