I'm not a big reviewer of anything, but my two experiences with Zulily compelled me to actually seek out a place online to warn potential customers before ordering from this sham of a site.
Basically, I had the same experience as everyone else here that left a negative review: LOOOOONG shipping times, missing items with no warning, hard to get refunded (even on items that I never received), HORRIBLE customer service (once I finally got a refund it was for a product I never ordered, which was also cheaper--how convenient), etc, etc.
I really wanted to like this site. I sent it to all my family members in anticipation of my first child. I have since sent everyone I know emails telling them to never order from Zulily.
Save yourself a lot of headaches and avoid Zulily.com