One of my preoccupations was about the surface finish quality of the parts. Mine came form Adrian Bowyer himself (the "father" of the Darwin machines), so I am reassured that the quality is "good enough" for the next generation of the machine, HE would know what's needed...
A while back, I purchased what was advertised as a 64GB memory card, to make sure I wouldn't be limited in recording HD video on my new camera (the 5D Mk II certainly needs storage space, with the new 22 MegaPixel sensor).
This isn't anything new, I recall the same type of controversy when 20MB hard drives came on the market.
Am I over sensitive to marketing bullshit, or isn't it time we got what we pay for?
Hey, memory manufacturers, how about calling it like it is? This is a 59.6GB memory card, and if you want to sell it as a 64 something, then advertise it as a 64 000 000 000 bytes card!
Even better: sell it as a 64GB card, and put 68 719 476 736 bytes in it.