Have had the Buffalo external Blu-Ray/HDDVD player/burner for about a month or so, and so far can't play or record Blu-Ray disks. Actually returned one unit, and when it was replaced I haven't been able to get this one functioning either. Have tried it on two laptops, one with Vista 64, and the other with XP OS's. I have both Blu-Ray and HD-DVD movie disks, and neither works. (They do work on my Sony Blu-Ray player and my XBox 360, respectively) At least with the replacement unit the HD disks do show up on the Nero menu, meaning the software recognizes that the disk is in the drive. Just won't play them. I'm guessing that there's some setting somewhere that I'm unaware of. If anyone has gotten their Buffalo up and running, please tell me about your experieces. My Buffalo drive is the USB-only version, no firewire capability.