FWIW, I've had my 2011 Edge Limited for a couple of months and haven't had any issues with it. Everything works as expected and, yes, the touch screen could be more responsive but I wouldn't call that a deal breaker. I took it in for a couple of recalls (body control module and software upgrade) and they didn't have to change out the body control module and the software upgrade went off without a hitch.
All in all, I'm pretty happy with my choice.