I'm using the software on a convertible tablet, so I can't compare the actual readers. So far, when using the software on one computer, they're six of one/half dozen of the other for me -- I don't see a clear advantage either way. There are enough books out there in both formats that I wouldn't want to do without either of them, or the Adobe e-Reader either.

My concern with Amazon is that they sent me email after I'd explicitly opted out of all marketing email. B&N has not yet done that. How frequent those emails are, and whether they're valuable or not, isn't really relevant to the issue of spam -- only whether the company respects a "no" when it gets one. Amazon did not. So far, B&N has.