I have used Aisin kits before and no problems with them.
but with the way business practices (most of them are re-boxers of some sort) and constant downward pricing pressure (to remain competitive out there), frankly, I do not know when something's gonna change even with Aisin kits.
Just like B-A in the past: I used to be a faithful follower of B-A stuff until early 2000s, where they went cheap and sourced parts other than Japanese OE stuff (used to get B-A mitsubishi distributor caps for Mazda and are of exact manufacture, but only a fraction of the price of factory units), now I use B-A sparingly, but only as a last resort.
I don't have much faith towards reboxers, to tell you the truth, and one single purchasing mistake (to save 30~60 bux) may ended up costing me a few k $$ for engine repair (out of my cost).
so no thanks, I'd rather err on the cautionary side of things.
BTW: when asked: I do not believe in any major brand names these days, but to do my parts shopping strategically and choose wisely.