Diki.....in reality a Style file is a SMF file. There is nothing wrong with playing SMF songs of which Roland does it best IMO....I have done jobs with 90% SMF all night too & play over the top....it all depends they all have their strong points....just another tool to use.....so If you have on-board Styles/SMF/& Mp3's you pretty much cover all bases ONLY IF THE NAVAGATION between all these modes can be achieved SEPERATLY at the SAME TIME like on a MIDJAY module.