This is a debate that is long and useless.

One side is like, "with technology, we can leave behind some of the old things we had to do in order to make room for new things. Vinyl is cool and all, but now I can carry around a billion mp3s and I can have more choices in my sets. In terms of sync, it's saving me time on stage for other things. I don't have to sit there and cue a track and fuck with it to get it just right, I can hit my button and its ready to go, giving me room for other things. I can plan a few tracks ahead and utilize interesting effects and transitions thanks to digital technology and tools like Sync... ultimately, it's a tool."

Another side is like, "anything that brings DJing closer to being an automatic computer-generated playlist is sacrilege. Not only do mp3s lack the warmth and headroom that a vinyl has, but we've ruined the art of DJing by moving so deep into the digital realm that the human on stage is effectively a waste of space. If you're going to use sync, whats the point of a DJ? Just have a computer do it."

And yet another side is like "Some digital upgrades have been awesome, I don't think anyone misses lugging crates of vinyl around, and using mp3s gives you the ability to use techniques that are impossible on vinyl. Sync, though, is like a cheat button, and brings things too close to being automatic."

And then there's a nearly infinite amount of people on the spectrum in between.

Me, I do it manually. I appreciate the human aspect of it, and I honestly find beatmatching to be a lot of fun. It gives me something to do. If I'm in a crunch for some reason, though, I mean... fuck it. Most people don't know, except for the chinscratching fuck who hangs around in the front not having fun all night. I also find that mixing with sync on doesn't really inspire me to "do something more" with my mix. I just... well, it's synced, and I kinda know what I'm doing already, so... I'll stand here and wait, I guess.