What would be the ★-rating of this review (★ being the lowest and ★★★★★ being the highest)? "It has potency for Sumi-e/Ink painting. It helps me to try Ink painting."
★★★★

What would be the ★-rating of this review (★ being the lowest and ★★★★★ being the highest)? "Good It is very useful"
★★★★★

What would be the ★-rating of this review (★ being the lowest and ★★★★★ being the highest)? "Cool"

★★★★★