If you can afford them, GET THEM!
All the best network/computer security in the world is nothing if the enduser refuses to use it... These readers have made it brain dead simple for my network endusers to comply with even the most basic computer security. Can't recall a password? Too lazy to type in your password? This made that all go away...
eikon TCRD4 ia one of the easiest add-on fingerprint reader.
These are great. easy to add-on. eikon offers free upgrade to Protector Suite 2011. basically, these just work. Hard to argue with easy.