No I haven't. I ordered mine with the bike. I did for aesthetic reasons after noticing them on some of the press bikes used on the Azores launch. It arrived soon after the bike, but I only got it fitted at the 1000km service. There was a noticeable difference in sound, even the dealership commented on it. It is not noisy in the sense that it going to annoy the neighbours. It is still respectable, but it has a bark (I googled some reviews this morning and found similar comments from reviewers). If I didn't ride with the stock originally I probably wouldn't have known. Mine also cackles when you throttle off. If it is not supposed to, I do not want it fixed!
Happy Riding