Totally disagree. Despite the fact they you look ridiculous when calling. You cannot use the S3 with one hand let alone this. What i mean by that is you cant use your thumb to control the whole display. Therefore imo it is not a good phone. As to the tablet part its quite simple. Its WAY to small of a screen. the mini is 8 inches and is the smallest you can go to do anything "tablet like".
An ipad is for many people is a replacement for a laptop/macbook. You are high if you think a 5.5 inch screen can replace a 13 inch one. Thats my thoughts at least.
Ok, a couple things. Some people can use the whole screen one handed, I can't, but a small percentage of people can. As for actually using the phone one handed, they have a feature that reduces the size of the dialpad and interface options during a call. This really does make it one handed for people with small hands dialing numbers, etc.
Ask yourself this, if I'm browsing on an iPad with a 1024x768 screen, how is it different than a Note 2 with 1280x720? The answer is, size of screen. But that's why it has such a big screen because it actually works well as a PHABLET. There's that word. It's not meant to be a laptop replacement, its a web/productivity/gaming device that makes calls in the form factor of a phablet, or large phone.