Burning 12 600-650 meg CDs (Using Adaptec Easy CD Creator): average deviation from theoretical burn speed - 2% slower
Not bad at all! This actually lived up to its advertised speed. Well Plextor has certainly done it again. They've made a fast drive that is also reliable (in the test I've copied 12 CDs, and none of them bad copy). The 4 MB buffer is extremely important to prevent cds from turning into coasters.