I haven't any trouble with Touch ID, modulo when my fingers are wet or I do something dumb like use a part of my finger that I haven't scanned (like the first joint on my thumb). That said, it takes way too long to work. I want it to be instantaneous and instead there's a noticeable delay in between when the screen flicks on and when I end up back on Springboard.
I've discovered that resting your thumb on the home button before waking your phone speeds up the process. When I do that I barely even see the lock screen. It's like the sensor eagerly scans upon contact.