There needs to be a decent way to compare these things. A standard metric.
The best rating is a 0 and the worst is a 30.
The 8 categories:
FitHow well does the nappy fit your kid's bum?
0 Second skin.
1 Trim and neat
2 Bubble Butt
3 Red marks/Gaping
4 Shameful and Painful
FunctionHow well does it work?
1 No major issues, might not contain a poop explosion
2 A bit too loose/too tight/not enough absorbency
3 Leaks, leaks, leaks
4 Might as well be naked
EffortHow easy is it to use?
0 The baby could change itself
1 Sleep-deprivation poses no risk
2 A bit tricky at first
3 Fumble, fumble, fumble
4 Can't even tell which way is front
How fast does it dry?
1 Line dries in <5 hours
3 Hmmm this one's still damp
4 Lapped by faster drying nappies
How does it feel?
1 Oh, that's niiiice
2 Meh, cloth is cloth
3 Scratchy/stiff/weird/pick your somewhat unpleasant adjective
4 Not on my baby's bottom!
FairnessHow does the price match up with the quality of the product, manufacturing conditions and material costs?
0 The price is right
2 A bit too high, but decent on clearance/seconds
3 Too high / Too low
4 Either sewn with gold or by very tiny hands
FancyHow much do you fancy the way it looks?
0 ZOMG GORGEOUS I'M IN LOVE!!!1!1
1 Super cute
2 Nothing special
4 Fell out of the ugly tree and hit every branch on the way down
Further0 I have nothing more to add
1 There is some other minor flaw worth mentioning
2 The is some other major flaw worth mentioning