I participated in a GO for 7079 shoes run by Tangerine and the company took forever, and there was some confusion on how much shipping from the company ended up being, so we ended up spending a lot on shipping.
There was also some confusion as to my order, the shoes I wanted did not get enough orders, then they did and I wasn't informed so I could get some. So I waited so long for just one pair of shoes.
Once she did decide to send them (after everyone had paid their invoices) they did come fast. But it was generally a tedious GO. Organized but confusing at the same time. I'm not sure if I would do it again.