Pros fast, fast,fast!
Cons tray faceplate is larger than old drives hole so may have to be removed to fit the hole in your computer case.
Summary Love the drive , it burns in about 5 to 7 minutes 4300gb of video. I'd give it a 10 for performance but because of the tray door having to be removed as otherwise not fitting I marked it down 1 point. Overall very pleased with the quality of the drive. No copasters so far.
Pros 18X speed, 10X in the first few seconds
Cons Better have a fast Harddrive to keep up with transfer rate.
Summary This is my 4th sony unit (My 810A stopped burning dual layers correctly - coasters), but my 510 and 720A are great spares. I was very impressed with the write speed, 18X plus and minus. Plenty of burns with no coasters so far. My external USB harddrive is having trouble feeding the burner when it approaches 17x speeds - I've corrected this by increasing my burning software's buffer. Internal drive has no problems. I would NOT recommended this drive (or any 18X drive) with systems that have a CPU's less then 2 gig or you will not see the true speed of this drive.
You will save up to 30 seconds between a 16X drive and a 18x drive. No problems with dual layers either, nice speed increase. With it for the price.