I too have ordered a lot from Zulily and have loved everything, mostly clothes which have all been really good quality. Highly recommend.
They don't accept returns because they don't hold inventory, it's kind of like Hautelook. Their customer service is outstanding, and they state under the return policy that if you get something defective they will make it right.
I by no means and pushing anyone to buy that unit, I love my Foreo Luna
Just posted this because I thought it was interesting to see, and if I didn't have my Foreo then I most likely would have bought this one.
If you look under the category "women" there are several other beauty sales now. I even saw the exact same sonic device Serious Skincare was selling a couple months ago, as well as some others cleansing brushes... and some well known cosmetics like Tarte and Borghese too.