It's faster, but..
With a real book I can legally buy/resell/trade/loan/borrow it without constraints.
With an ebook I have no such rights.
Right now I can go to a garage sale and buy a used book for a pittance.
I can also resell a collectible book, like the first Harry Potter, for a significant sum.
They've shown they can withdraw a book I've paid for without my permission, or perhaps
I have theoretically surrendered my permission to them by using their device.
Remember the flap over the 1984 book they decided did not belong to the seller so they
recalled the editions, rather than simply compensating the copyright owner for their mistake
in allowing it in the first place? Stupid since they would have to refund the money anyways.
Ebooks can be useful, but usually not more than a PDF file on a notebook.
I see them as a great replacement for bulky reference books, which is why they sold all of
those CD/DVD versions of encyclopedia back in the day.
Once I have the same rights with ebooks as I do with real books, I'll consider it.
Until then, FAIL