The official PopSci Review Rating Scale
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0.0: Avoid at all costs

0.5: Barely functional

1.0: Little to like

1.5: Nice idea; lousy product

2.0: More bad than good

2.5: Middle of the road

3.0: Shows promise

3.5: Decent, but not great

4.0: Solid all around

4.5: Almost perfect

5.0: We can’t find a fault