I do order clothing online, but never from the pop-up ads. I only purchase from shops/stores that I know such as J.Jill, Land's End, and LL Bean and Christopher and Banks. I always, always shop the bargains but I can depend on the quality and delivery is generally less than a week. Never tried Zulilly. I am hoping to do some "in-store" shopping this summer as we begin to crawl forward toward normalcy.
(I was gifted a clothing item for Christmas from Vermont County Store and it was/is excellent quality.)