Just try it. Basically, these adapters are not different from external enclosures. Okay, this one is lacking the case and the power supply. I own some similar device, and it works acceptable.
The performance of an externally connected DVD writer is influenced by the USB controller of your computer, and by the cooperation of USB/IDE-adapter with the burner. So no one can tell you if your NEC will work with that adapter. You’ll have to try it out.
Concerning DL, most media isn’t that reliable, so you should stick with Verbatim, preferably the 2,4x “Made in Singapore”. These are the best supported DL discs.
Okay thanks. I bought the 6x Verbatim “Made in signapore” though, is there a difference over the 2.4x one?
I will try for myself then. Maybe run one of those scans too to see how well it does.