these are teac(as opposed to the 8432, which is an acer 84321a or something), and mr. lukfilm has forgotten(?) to mention that these come with nero 5--which has a serial number

on the instruction booklet
and yes it's a quality burner

imo
UPGRADEABLE nero alone is worth $39--i been waiting on these for two months at least (bought one for $49 previously and got one dat for $39 as well)--good post