Studying usability of biometric products is of great interest for learning in advance how users will behave once the system is installed. This paper presents the work carried out for the evaluation of the usability of five access control systems based on fingerprint recognition. Users are grouped by ages, and a homogeneous representation of ages and sex are considered. Results will show how different devices can present different results considering usability, and conclusions will provide the lessons learned as to be applied in following evaluations.