[Haesslich]

For me, I wanted the convenience of 3G - no tethering, no making sure my phone was charged and had enough data remaining, etc. I want to buy a book? Fine. Wiki or translation? Done. Grab that file in my Personal Documents I only need once or twice a month? Got it, no extra fiddling required

You'd have to figure out for yourself if any of the above statements suit you, or if you don't mind entering WPA keys or the extra steps to activate a hotspot on your phone. For me, if I wanted a wifi only reader, I would stick to my Kindle Touch or one of my Kobo readers.