I am happy to report that Sony has provided me a full refund (purchase price plus tax) on my PRS-505 Reader (even after it was engraved), the A/C Adapter, and all eBooks purchased from their online store.
Sony specifically markets their device for the sight-impaired, even though it does not consistently meet the needs of many people who fall under that category.
I see this as a victory for all sight-impaired Sony customers who wish to pursue a refund from Sony for the Reader and/or eBooks in the event either (or both) do not meet their expectations.
Feel free to read more details about my experience at:
http://crusading4u.blogspot.com/