Build quality Is it consistent? Are components up to the task? Are shells round? And so on.
Playability Does the product convincingly do the job it was designed for?
Value for money Does the price reflect the product fairly, and how does it compare with competitors? Each area receives a star rating out of five. These ratings are then collated to arrive at an overall Rhythm Rating. Poor: sub-standard product Average: acceptable but uninspiring Good: above average Excellent: superior product Outstanding: impossible to fault