MPG just sent back the OWC Accelsior 8M2, after using it for over two months. Offering SSD performance double that of any SSD offered by Apple (quadruple for most Macs), it performed flawlessly the entire time.
Performance is/was insanely fast, and at a level that supports ultra high-end 8K video processing, data analysis, etc. Indeed, it is so fast that you can just forget about that as a factor.
The speed so superlative that it can be forgotten about, what the Accelsior 8M2 really offers then is huge capacity for big jobs that require speed—up to 64TB in a single-slot card!