Now, if I could just get the fingerprint scanner to work for purchases...
After every reboot you have to retype your iTunes password for purchases before the fingerprint purchase becomes active again. For me I reboot about as often as I purchase so I hardly get the chance to use my fingerprint to save time.
Also if you turn off fingerprint purchase you can type your password once and purchase several items without having to retype your password. If you have fingerprint on, you have to touch your fingerprint for each and every purchase even if its just been a second. It annoys me.