Initial product was dead in the box, but Amazon changed it with no quibble, and the replacement arrived next day, and Amazon have confirmed receipt of the faulty unit.
Regarding the psu. As its a modular unit, it was very easy to fit, you only use the cables that you need, so any redundancies are left out of the case, thus helping to improve air flow.
I have an Antec 900 case, which has a clear side, so the psu and cabling looks good through the side window.
Performance wise, the system has never shut down unexpectantly since fitting this product, which used to happen under the old psu. Whether this is down to an increase in wattage, 700 to 850, or simply being a higher quality product I am not sure, and am not professionally qualified to comment, but I suspect the latter.
But I would most definately give Amazon 5 stars for how they handled the initial problem and supplying the replacement and 5 stars for Corsair, for what is clearly a well thought out and superior performing product.