When was the last time you read a CDRW manual anyway? The only time it's conceivable you would need it is in the initial installation. If you've got past that bit, who cares about it
The LiteOn 52x is one of the better budget CDRWs out there, and I doubt you'd find it easy to get a better writer without spending a lot more money. I'd keep it.
As for support, surely if the drive dies you send it back to the store you bought it from, and if you're simply not satisfied with the performance or have compatibility issues all manufacturers just pay lip service (after keeping you on-hold on the phone for half an hour) then stiff you anyway? That's always been my experience anyway, although the after-sales service standards might be better in the US....
I'd be interested to know where ZDNet get the idea from that the Cendyne 52x writer has "better performance" than the Memtek, given that they are the same drive with a different sticky label affixed. Perhaps different software, I don't know, but the drives themselves are no different.