What I love with the fingerprint sensor on the X Compact is it is on the power button. Since Sailfish X doesn't have double-tap-to-unlock, it means that I have to use the power button to unlock anyway. And when the sensor is on this button, I don't even have to move my finger to do both actions: waking the phone and actually unlocking it. The unlock is almost instantaneous.

It could be even faster if I didn't have to press the power button first. In combination with the Sneak peek feature, it already works without pressing the power button.

Also, Sailfish allows recording several fingerprints, this way I can use several fingers depending on the position of my hand.