That was a very good price for the PDN. If you've already got an iPad, then the PDN would probably look like a step down, but for those of us unwilling to shell out the money for an iPad, it's a neat little toy.
I like my Aluratek, too. And since it doesn't have a clock, library books borrowed on it don't expire (just don't reconnect to the Adobe Digital Editions software until you are done reading them).