Bought it last time it was on sale and have mixed feelings about it...
The idea for me was not so much to create four part loops but more to record it into music being worked on.
Meaning that if the music being worked on is in a specific scale and tempo the Kaossilator gets set to them same and then "jam" and record and see if there is useful parts that works out.
Think that it works but in my case not so well as the sounds and music being made by me is not very compatible with the well produced sounds of this app...
But if you have some extra money and are curious it can be a good thing to have in your toolbox?