It cleans and conditions the fretboard nicely, and it's allways satisfying to see that shiny, dark wooden surface.
Only reason I didn't give it five stars is because the conditioner applicator is a pain in behind, as it sometimes seems to struggle to come out. One time I squeezed it too hard in frustration and the top came loose and spilled conditioner all over the guitar. Not a major issue, just something that bugged me.
Overall great product, would recommend.