After reading many reviews, next time I'll choose a retailer with a much more accommodating return policy just to protect myself as a consumer. If I'd had to RMA the power supply, I know that it would be very frustrating for me to wait weeks through the process, let alone pay the shipping cost for it.
Order was placed on a Friday, paid with PayPal and the payment processed quickly. The power supply that I bought was shipped on Tuesday evening the following week, and a tracking number given. West coast to East coast UPS shipping was 4-5 business days, as it arrived on Monday the week after that. My recommendation is to not order on a Friday; Wednesday or Thursday, at the latest.
The price with a rebate was lower than Amazon at the time, but the day that it arrived the price on Amazon was $2 less without a rebate, so your mileage may vary. If the rebate goes through without a hitch, I don't mind depriving Amazon of the sell, personally. The PSU that I bought is functioning without issue, so I don't expect to need to go through RMA with Superbiiz. It also has a 10-year warranty, which is why I've registered it so that there are no worries on my mind.