I have a sony reader and I loved it (the pocket reader is only $189 at walmart) but recently it has frozen on the begining screen and I cant restart I dont know if it was just mine or not, because it got really good reviews and is cheaper than the other ereaders. editing to add that apparently it wasnt frozen. I emailed the help center and they helped me fix it. also it does not take any battery to turn it on or off or it will not use any battery if it stays on (this is why I thought it was frozen) it only takes battery to turn the page.