Hum, this is Firewire/1394-only, not a combo Firewire/USB2 enclosure. I prefer combo or triple-interface enclosures for the flexibility of being able to use them on any machine.
Also, pray that you get an Oxford 911+, because older Oxford 911 chipsets are really slow compared to other Firewire chipsets. Oxford got it's reputation for speed and reliability when being used with hard drives in 3.5" enclosures. As far as many people are concerned, Oxford isn't that good of a choice to use with an optical drive.
What problems have you had with USB2 enclosures? The best USB2 chipsets are the Genesys Logic GL811E-04, the USB2 half of the Prolific PL-3507, and anything from NEC. The Cypress AT2+ is OK, but only if it's been configured properly from the factory, and many times it hasn't (you can tweak it to perform faster using special software from Cypress).
With USB2, definitely avoid the ALi chipset altogether.
I'm not too familiar with the Myson USB2 chipset, but it's not really recommended by anyone either.