as far as F&F and materials EKI makes good stuff, as good as BM imho, though i dont own an A100 i do have ~ a dozen EKI's and a couple of custom emersons & all have been great knives.
the only con ya ever hear about EKI is:
*weak liner locks - EKI has been a lot better in this regard since ~ '02 or so and they dont seem to have the probs they had (or some say they had) for a few yrs, the EKI liner locks are as good as anyones, but like any LL they can wear and go outta adjustment especially with a lotta inertia opeing or waving, if ya have probs ya can send it back to EKI & they will fix it no problem, usually for the price of return shipping. as far as myself i have had to send my SOCFK in for adjustment one time since '01, only other emerson i have had lock issues with was a BM 975 (an emerson design).
*the grind - all EKIs are ground a little different, none are a std "V" grind (like say a spyderco delica PE) & they require a little different technique for sharpening, but they cut just fine and once ya get used to it sharpening is no biggie either, if ya can sharpen a std "V" ya can sharpen an EKI. also due to the grind some say they arent the best utility knives (EKI's are designed 1st & foremost for self defense FWIW) but imho they will work just fine for utility, maybe not the best whittling knife lol, but other than that or really fine work they work just fine.
i like the A100 and most folks i have seen post about them also like them, i do have a I&I tanto which has about the same handle, & i like it a lot, if ya like the A100 imho there are no big cons to conmsider go ahead and get one, i imagine ya will love it.