Passcode unlock has been working flawlessly for me, but I've been having trouble with the App Store app not prompting for a scan. I figured out tonight that it won't prompt you to scan if you have the restriction set to require a password immediately for purchases (instead of the 15 minute option).
Now both types of scan are working great. Touch ID is an amazing feature.
Now both types of scan are working great. Touch ID is an amazing feature.