A little too harsh maybe.
I’m using Traktor Pro and sending MIDI clock to my X600 for EFX sync on the mixer, works like a charm. In case I change the tempo of the track, the BPM on the mixer matches to the new value in like… 2-3 sec. BPM fluctuates to 0.1 but doesn’t seem to matter for the EFX.
I mapped the DDM’s sampler to my sample decks in Traktor (not remix decks, I’m on 2.1.3 or whatever the hell it was before the remix sets came out), and I gotta say it’s pretty convenient. I usually only use 4 loops/samples at a time anyways, so Deck D is normally empty. I have C and D outputs going through the Main Out of my A6 into channel 3 on the DDM. It’s a handy little feature, and it’s stuck with me for quite awhile now