When compared to other similar extensions, it has way more presets available out of the box than its competitors beyond just simply slow+reverb, nightcore and bass boost. 4/5, it's a bit disappointing that the Per-site profiles w/ different settings is locked behind a paywall.

EDIT: Changed my mind, it's now a 5/5 because the dev team lifted the paywall restrictions and made it more convenient to use in so many ways possible thanks to this update.