Blu-Ray is the next-generation blue-violet laser optical disc format created for recording and playback of high-definition video or for storing large amounts of data. A Blu-Ray disc will store over 4.5 hours of high-definition video or about 11.5 hours of standard-definition video on a 25GB disc.
I have burnt 5 of these at 4x speed using LG BH20N burner in Windows 7 and all them got burnt under 25 minutes and all play well on my Panasonic DMP-BD60 player. I cannot tell about how they will perform in a long run as these are just launched 3 months back. I would definitely be buying more of these again. I used ImgBurn and it works great. This is the data from their website and they used Nero Burning ROM 6.6.1.15 for testing.
Burner Interface Manufactured Firmware BD-R BR2 Ritek LG BH08LS20 SATA 2008.12 1.00 8x BH08NS20 SATA 2008.11 EL02 8x GBW-H10N ATA 2007.03 GL06 - GGW-H10N SATA 2007.06 1.04 2x GGW-H20L SATA 2008.01 YL05 4x GGW-H20N SATA 2008.03 XJ04 4x Liteon DH-4B1S SATA 2009.01 7P5A 4x LH-2B1S SATA 2007.04 AL09 2x Panasonic LF-MB121JD ATA 2006.04 BD02 2x LF-PB271 SATA 2008.02 1.02 4x LF-PB371 SATA 2008.11 1.02 4x SW-5582-C ATA 2007.05 BZB9 2x SW-5583 SATA 2008.01 1.02 4x SW-5584 SATA 2008.08 1.00 4x Pioneer BDR-101A ATA 2006.07 1.00 - BDR-202BK SATA 2007.12 1.08 4x BDR-203BK SATA 2009.02 1.10 8x Plextor PX-B900A ATA 2006.12 1.01 8x 2x PX-B910SA SATA 2008.08 1.01 4x PX-B920SA SATA 2008.04 1.03 4x Sony BWU-100A ATA 2007.04 1.0e 2x BWU-200S SATA 2008.01 1.0b 4x BWU-300S SATA 2009.03 1.0b 4x
Update: I have burnt 16 of them so far and none of them were coasters. Really happy with the purchase.
My Pioneer BDR-205 burner produces all coasters with this pack of discs, every time.
Burning the same files with the same burner to Verbatim discs works perfectly.
I've bought a lot of Ritek/Ridata CD and DVD media in the past and never had trouble, so this is disappointing. I won't be buying any more Ridata BD media.
So far I've burned 12 of them and not a single coaster. These are working out better than the more expensive name brand ones I used last time.
EDIT: Some months later I am now burning my 4th pack of them and they are still working out very well! Not sure what's up with the 0 of 6 rating for my post. What can I say? They cost me less than others and have worked out better!