I have stopped using my fingerprint reader on my laptop.
Aside from the crapware required to make it work, I got a sensible advice from our IT Admin that Biometric Devices, when replaced with another one, will not give the exact same readings.
This means, fingerprint data taken from Biometric Device A will only be usable to Biometric Device A.
If Biometric Device A gets damaged, you'll replace it with Biometric Device B. However, Biometric Device B will not accept your fingerprint data, because of tiny inaccuracies when making matches to fingerprint data taken from Biometric Device A.
Consider also: What if the policies require logging in using BOTH password AND biometrics?
Strict and secure facilities do this (like what we see in movies) -- Scan the eyes, Scan the hand, Vocal Analysis, and Enter the password. "ACCESS GRANTED". The door slides with a whirring sound.
If any one of them fails, it's "ACCESS DENIED". Then red lights furiously blink all over the place with loud alarms.
REMEMBER: In 2006, the MythBusters have shown that a moist photo copy of your fingerprint is a good backup: http://www.youtube.com/watch?v=LA4Xx5Noxyo (Thanks to Arjan) So it makes sense to enforce logging in with BOTH password AND fingerprint!