You can see that the ASUS DVD-E616P3 has processed our standard pack of DVD discs worse than the rest of the drives. It has had problems with two discs. The Plextor PX-130A and the Sony DDU1622 have each failed on one disc. The Sony DDU1622 has had a rather low speed when reading the DVD-ROM disc, suffering an unexpected and unexplainable speed slump in the middle of the disc surface.