Ok. I have been shopping from this site since last 3 years on. Must have placed around 50 orders. I agree that shipping is slow, but come on if you want next day delivery then buy it from Amazon. However here are few observation.
Only buy kids and home stuff from this site. Women's products are not good except for scrafs and jewerly.
Before ordering check the price on amazon. In very few cases I found it was cheaper on amazon.
If the product/brand is available on amazon then check the reviews. There are no reviews on Zulily.
I have bought some very amazing kids clothes from this site and is happy!