Treating ordinal ratings (1-5) as nominal labels is not the best solution, IMO. It's true that the "distance" between each rating is not equal, however disregar

Treating ordinal ratings (1-5) as nominal labels is not the best solution, IMO. It's true that the "distance" between each rating is not equal, however disregarding the fact that 4 stars is greater than 3 looses quite a bit of useful information.