While I can imagine purchasing one of those in the sense that I know they exist, I'm pretty much with the GP in that I can't imagine myself actually choosing to do so. I think this is partly because new phones are just crazy expensive these days, so I pretty much always buy a year-old model second hand. But also because I don't like being locked into such a contract (although to be fair, that last part is somewhat of a privilege in that I am able to afford to buy the phone up front)