First, the basics. Samsung's sensor is on the bottom portion of the screen, not integrated into the home button as originally thought. To unlock the phone with your finger, you swipe along the glowing path about half an inch from the bottom of the phone, going down and over the home button.
Setup took just a few minutes, after swiping your finger eight times along the sensitive portion of the screen to fully read yourprint. You're able to register only three profiles, for your own fingers or for someone else's.
The swiping area seems like it's pretty limited to a narrow, vertical strip. That means your finger has to be more or less vertical to succeed, which also means that you will probably need to hold the Galaxy S5 with one hand while unlocking it with the other. You may chose your index finger.
Scanning for prints worked pretty well, but you may experience some misfires if your finger wasn't correctly aligned or if you moved too quickly. If you do error out, you can also access the phone through a 4-digit backup PIN.
Overall, I like Samsung's approach to biometric unlocking, and it's something I'd use, especially if I were going to buy products through PayPal's fingerprint-scanning verification program. Check out the gallery below.
