Short of ridiculously high profit margins, competition on cost alone only serves to force otherwise high quality manufacturers to compete on cost through a reduction in quality. SMIC's are one item... but imagine what happens when you apply the same concept to something critical like suspension or engine compenents. Recipe for disaster.
I guess more people on here have used them and given positive experiences, they seem to be quite efficient and have an acceptably low pressure drop. They're also bigger I also have found them to be a huge improvement over the stock coolers at 12psi - the car is much more responsive due to have a cooler intake charge The Japteks are perfectly OK to use at 15-18PSI (possibly more, others may provide better info) without issue as long as you have supporting mods to prevent running lean and detonation.