News to me, I never realized VisionTek make (or made?) burners. Anyway, Ryan from Speedy3D let me know they have posted a review of the 48x12x48 burner which may be of interest to you.
How is VisionTek able to open their Xtasy line of products to the CD-RW market so quickly? They quite simply, and intelligently, chose to remark drives made by CD-RW powerhouse LiteOn. This is nothing new as there are many other manufacturers will purchase drives produced by other companies, re-mark and resell them. Thus, they will cut down on manufacturing and R&D costs dramatically, and also allows a company to leverage its great customer service and pricing structure to better compete with others.More information at Speedy3D