First of all I got to say that I have the Dunlop Formula 65 Fretboard Kit for 2 years now and I don't regret it. After the first time cleaning the neck of my guitar that wasn't cleaned for about 6 years or so it felt like heaven.
+ Like the Polish Kit, the two bottles lasts for a long time, I clean the fretboards of about 8 guitars for 2 years now, each time I restring them and they are still not empty
+ The Oil revitalizes your Fretboard wood. The fretboard wood on one of my guitars was really dry and the color was light. Needless to say, it wore off pretty fast before.
- Better not use it on maple necks. They may become dark (experienced it myself, didn't read all the instructions ;) )
PS: When the fingerboard of your guitar is really messy, I recommend using some AAA steal wool to clean the fretboard and and the frets.
But put tape on your PUs, just to make sure no metal dust becomes stuck on the pole pieces.