This is my only fretboard cleaning product now.
When used on rosewood, the fretboard gets darker and looks much healthier and richer.
It gets a really lush shine from it.
It does not get that oily feeling that you can get sometimes, just be sure to wipe the excess off after a few minutes(as with all oils on wood)
As i don't have any guitars with maple or other light fretboards i can't say if it's yay or nay for that, but i imagine it works just as good there as well.
It's very competitively priced and it works really well, it smells super nice and the guitar feels much nicer than it did just a few minutes ago.