Ive been using Zulily for about five years. Ive had a lot of hits and misses. I now only buy trusted brands, or else I keep my expectations low.
Things Ive had good luck with: kids Osh Kosh shoes, kids pjs, womens jewelry, Melissa and Doug toys, kids clothes in general.
Things Ive had bad luck with: home goods, womens shoes, and womens clothing (although Ive kept the last few things) The clothing really is a gamble.
Shipping is slow. You pretty much have to order and then forget it. Ive had a couple of customer service incidents. I received dirty curtains once but was refunded and told to donate them. Another time I ordered some kids shoes that took an unusually long time even for zulily. I emailed them and they pretty much just said yeah, theyre not coming, and refunded me, plus gave me a credit. Like I said, keep your expectations low, lol.