I don't think there is a dj in the world who doesn;t have the occasional blip when playing. True some are smoother than others but to be honest i've heard smooth perfect sets that just aren't as interesting as someone spicing up the mix, bangin in a varied selection and just mixing it up more. JUst my personal preference, there is no wrong or right here imo. As long as the dj is competent I can accept the odd mistake, especially when playing a 3-4 hour set, wether it's Mills or DJ Unknown