I've been with Gwynnie Bee almost 2 years and there have been way more ups than downs. Yes, you have to keep an abundance of item in your closet to get quick shipping.
Yes, you have to get to know the brands and learn your size in each brand so you can order the right size. Brands are not consistent in sizing- that's life.
Overall, the clothes are trendy, professional, and high quality, I never have to pay for dry cleaning, and any issues have been resolved promptly and to my satisfaction.
It works for me and the 4 friends I've referred to the service.