I don't know what your point is Schmidtn, imperial units are better? Easier? or what else? I just don't like how much (US) Americans don't know and use the SI system and feel that what kids should have known from childhood (SI) is simply not there. They would think a mm is like 1000 of a m and make all sorts of mistakes with the SI units, where you can't imagine. This is a barrier they didn't have to cross for a science/engineering career if they used SI as they grew up. Since you've used metric you should know metric is easier, unless your love for your country overcomes your smart. If I had to use fractional system like those used in this country, I won't get very far on my physics. I have no problem using decimal with inches but I really have no love for all the different units among lengths (inch, foot, yard?, mile), between lengths and area (acre), and between lengths and volume (I don't care nor do I remember them), where they're supposed to be as simple as m, m^2 and m^3. You folks in Europe and Asia even understand what I'm referring to?
With that said, I repeat, SI (metric for length) units are easier, unless you're a physicist and use Gaussian units for E and M, and natural units in high energy physics.