Ykk makes so many types of zippers, it's hard to tell quality really... I am sure they are better than others (wife buys terrible amount of crappy non-ykk zipper clothes)

I have had 2 jackets fail within 1-2 years of purchase this year, both the zippers broke and both were ykk(never had a zipper failure myself before).

It wasn't worth local tailor/seamstress to repair vs costs of jackets, I ended up throwing them out