Absolutely solid construction, lift the unit up and you can feel the weight! The buttons have a good action, and the jog wheels are really easy to use. The VCI linked up to my Traktor Studio 3 software a treat. You can download a .tks file from the NI/Vestax website. The sliders are smooth, its fairly easy to pitch and beat match tunes together. The sync feature is very accurate if the BPM is set up correctly for each track in DJ Studio 3.