Just went and skimmed through this,, definately wasn't bad or anything. Just could do with a tidyup in some of the transitions. Beatmatching in some spots, phrase matching i picked up a bit out in one or two. When i listen back, some of the 3 deck mashup mixing actually worked well, and others not so much. But that more comes down to knowing your tracks well than anything, and you stated you didn't know them that well. The three deck stuff can work, but you gotta know the buildups, drops etc. in the songs well. Which it worked for some, others it sounded a bit too full on. But also what cupe said, people hear a slip up early and they bias against you the rest of the mix, which isn't really 'fair', but that's just how most people work.