I have dabbled in it myself , but to be honest didn't manage to perfect it. I think with three deck mixing you have to be very particular about how and when to use the third deck. I did nail it a few times but not enough that I felt confident about doing it regualrly. Damm good fun to practise though.

I say do it if you can , practise it if you want , but don't play it out unless you are capable , cause that DOES mean it is just for show as opposed to adding to the performance.