I'm pretty positive on iOS gaming (see: Severed, 80 Days, Horizon Chase, Super Hexagon, Squeidos' GO series, XCOM, Invisible Inc, etc) and I'm put off by the price. The Rayman games are really polished auto-runners that take advantage of most mechanics in the console series (jump, wall jump, hover, etc), with discrete levels built around them, they're pretty good, and they're only $3.
Now, I understand that Mario is a much, much bigger IP and console Mario games are generally seen as better than console Rayman games. I think the issue is that when both games are pared down to one button controls, that quality gap shrinks because, frankly, I only think there's so much you can do with auto-runners. I'm struggling to think of anything that Nintendo could do in Super Mario Run that would really be creative or push it over the edge over competing games. A lot of the fun of 2D Mario is exploration and light puzzle-solving, or pixel-perfect speedrun-esque levels - the former will be difficult due to auto-running/1-button controls, and the latter is already covered by games like Rayman.
Now, will it sell poorly because of the premium price? I don't want to underestimate the Power of Mario, but I think they're certainly losing some customers who will instantly balk at that price, myself included. All I can say based on the footage I've seen is that there's nothing to make me think it would command a $7 premium over competing titles.
