-Better at copying protected discs
-Works with K-probe to test the disc quality.
-Bad media compatibility
-Questionable write quality with some discs
-Still needs a few firmware upgrades to shape up
-IMPRESSIVE media compatibility (Have yet to find a disc that do not work)
-Good write quality, even with cheap brands
-Been in the market for a while and do not have any serious problems.
-Not perfect at copying protected discs.
-Lower CD-writing/reading speeds
Personally I love the pioneer due to the outstanding media compatiblity and write quality.