Let me tell you, I really hate shit like that. "Up to 90% off" means only a couple items are truly marked down to sample sale prices. Despite that, I went to check it out based on the review on Refinery 29.
So how was it?
Beyond lame. Seriously, things were not even cheap. A regular plain hoodie was around $40. The hosiery was even more expensive than the prices I paid at the outlet (granted, there was a special 80% off promotion going on at the time). Oh and they didn't even stock the winter leggings which I was interested in buying. They had all kinds of basics and tacky leggings... and an ugly vintage clothing section.
Since parking in Marina is a f'ing nightmare, I felt that I needed to buy something to justify the trip there. I ended up buying one item: a thin sheer navy cotton lawn shirt. I think this shirt has potential to be cute layered in the spring. I was interested in the houndstooth or striped jacket... but it was more than what I wanted to pay (~$50 maybe).
I believe I went on the last day (or second to last day), and I was surprised the prices were essentially the same as what was reported by R29. There was however an additional 10% off for some reason... which was not advertised anywhere. Strange.
Basically... American Apparel is one sample sale you may skip out on. The prices are not cheaper than the outlet, so why bother? I can't believe there was a riot in London over this type of sale. Lame lame lame.