Bought a Moser Baer LiteOn DVD writer just last week.
Seems to be working fine. However have burnt only 2 DVD-Rs and read from DVD-R and CD-Rs. No apparent problems.
Had a problem with the UDMA mode - it was stuck at mode 2 and I tried everything under the sun to get it to work at mode 4, without success. Finally discovered it was the IDE ribbon cable that was preventing it from working at Mode 4! Replaced it yesterday, and it came right into Mode 4 after rebooting!