anybody try the viwoods ai mini?

got the na4c, and so far i dig it....but its dark and grainy, but it kinda has a nostalgic newspaper charm...just discovered the viwoods ai mini. it has excellent reviews. anyone try any of the viwoods products?

color isn't mandatory for me but it helps with my notes and browsing. wondering how much better better or worse the viwoods mini screen will be considering its b/w but also uses carta 1000. liking the portability too, i think the size will be better for taking notes out on the field, but also could get cramped after awhile so maybe the na4c size might be better. can anyone compare both?