I used one of the micro sync about 3 or 4 years ago, when I read the manual, the was a large section about the push and pull buttons, and how to keep it in sync, Well When I tryed it, it was crap, tryed with techno, hard house, trance, break beat, old school , and DnB. On the 4X4 styles it got the bpm somewhere near right, but the sync soon went out of time, With Dnb the thing just gave up!
lol.