If I could, I would give this site a 3.5-star rating, but seeing as they're not 4-star quality, I will settle for 3-stars.
The offered information on the shipping when you're placing an order is misleading, seeing as they don't ship until 10-14 business days AFTER your order is placed. The package tracker didn't really help at all.
I actually got an email from the website telling me to redo my payment information. When I called, even though it took a bit for a customer service rep to answer, the customer rep was VERY nice, polite, and helpful and assured me that my payment was accepted and my orders processed, so I would give them 5 stars for their customer service!
I do like the quality of the garments, mostly; some things are on the translucent side, and I'm not a big fan of sheer clothing. The shoes were my favorite part and I'm still on cloud nine from them - I have trouble finding shoes in my size (10-11 in womens) and these 10's fit perfectly.
I will say that the fit of some of garments don't match the size charts even within the same company sale; I bought the same three sizes from the same company, and one was a tight fit, the second was a bit on the loose side, and the third is way too loose in the chest and I have a rather large chest.
My final note is on the pictures and descriptions: they do not accurately depict the clothing and shoes you order. Because there is only one side shown, you can't really tell what the back of your garments will look like; for me, this aspect was a pleasant surprise because the entire back of my pullover was lace and it looks awesome. Some of the colors, too, are misleading. I bought a bra that was described as "azure" and the photo showed it being a light turquoise, almost a cyan color; the actual bra has a yellow cup with a blue lace overlay, making it more blue-green-yellow than I initially anticipated. The fit of it was pretty good, especially since I was staking a stab at which size would fit best based on the measurements, but still a bit tight.
Overall, my experience with zulily was okay. I would shop with them again, sure, but I'm not sure if I would buy clothing other than shoes and tights/leggings simply because of the sizing issues.