I agree with Bob. And OWC support has a very informative video
on how to install the drive in your Mac.
And the 110 can do DL discs. I just experimented with backing up
a commercial DVD onto a DL. After MacTheRipper did its thing, Toast7
wrote the 4.5X DVD in 11 minutes -- no hour of compression needed,
and picture quality was magnificent. I was almost impressed enough
to switch from 50-cent DVD-Rs. But we retirees on declining incomes
have to scrimp, and time is what we have lots of.