Summary: Bought brand new. Racked it up in my studio, not in a DJ setup, so it never got banged around or abused, and received fairly light use. After about three months it stopped reading CD-R's, so the MP3 feature became useless. Then after six months it stopped reading any discs at all. Had it repaired, got it back after "laser adjustments" and it played exactly one track on one CD before slipping right back into the same problem. It's useless.
Summary: I purchased this exact model over ten years ago along with a double CD player of the same line. I've used these as a mobile DJ all this time and never had a problem. And as much as I move these players around and getting banged up, they still work perfect.
Summary: I install pro-level sound systems in gyms, stadiums, churches and athletic fields. I've installed several of the Numark MP-102 CD players for my customers because of it's ease of operation, price vs quality, features and ability to play just about any format of recordings. If you're setting up a home studio or preparing to rock the house of 10,000 listeners, you can't go wrong with this unit. The +/- 16% pitch control and stutter loop features are always a hit.
Summary: Pure "consumer grade." This machine failed after a few weeks of on-air usage at our radio station. Upon opening the box to troubleshoot we found loose connections between circuit boards, circuit boards held in place by their connectors, and a 1970's style circuit board with wire jumpers instead of vias. The CD mechanics are plastic. Professional? Definitely not.