Positive / negative is usually a starting point for digging deeper into reviews. People understand 5 starts as they’ve been accustomed to them. I rarely pay attention to tags and go straight to review body to see specifics. But, tags can be useful as a summary, I think combined with a full review they are a great way to scan multiple reviews for patterns.

Ultimately, the quality of review falls on the person leaving it (if they can be trusted or not) and the duration of their experience with the product. Eg. Trust a person more if they had the thing around for a year or two vs. “I tested this for 5 mins”