I have the Kin One, which is the most adorable little phone ever. I'm pretty sure it's a feature phone; it's so stupid that it's definitely not a smart phone, hahaha. I've had it for just over two years now – since March 2011. I have loved it to death. It's so unique and different that I can't help but like it. Unfortunately, though, it's missing some important features, such as the ability to add your own ringtone or delete individual messages. But it does allow you to add music and film videos, and there's wi-fi without a data plan, so I was happy.
However, it has NOT stood up to the test of time, and I'm hardly able to text on it anymore. My keyboard is half broken. The a, q, and s buttons don't work at all, and almost all of the other buttons only work half the time, especially e, r, c, and i. It hurts my fingers to text now because I'm pounding the buttons so hard, nd ll of my mezzgez look like thiz, zomtmz lk thz f mor buttonz don't wok. And it all depends on the day; sometimes I unlock the phone and all the buttons work perfectly fine for one message. Then they're broken a minute later. XD