Found this interesting. It was on a laser manufacturers site telling why their laser is better and safer than other lasers.
Energy Feedback Control (EFC) Technology
With other lasers, there is always a concern over calibration. Not only do those lasers require long start-up times because of lengthy manual calibration requirements prior to use, but throughout the day the systems need to be manually calibrated (repeatedly) in order to continue delivering reliable results. The problem with that is, it leaves you open to operator error, it substantially slows down your patient flow, and it leads to uneven and progressively worse results for your patients.
"It is a good thing to learn caution from the misfortunes of others."
"If you wish to succeed in life, make perseverance your bosom friend, experience your wise counselor, caution your elder brother, and hope your guardian genius."