Instruct: Classify Amazon reviews into positive or negative sentiment
Query: beware of DRM and lack of sideload capability

a huge lack in the product is the lack of a memory or SD card to sideload content. your are forced to use the amazon portal and sprint wireless network. as a result, amazon has total control over your library! they delete your books at any time. they recently deleted hundreds of readers' copies of 1984 without their permission is that big brother or what?[...]