Actually the adjustable model is better.
It allows you to get the maximum output from your laser.
This is because the diode current can be adjusted by the user to obtain maximum brightness without over saturating the crystal with IR, which can reduce output and or degrade stability.
With the non-adjustable model, you get full current at all times. It's nice to be able to reduce power as well if you desire it.
Lasercraze,
I promise you won't be disappointed and if it's not enough power for you, I'll offer to let you upgrade to a higher output model within 3 days of use.
Also, checkout our testimonials page.
I just added a letter I got from a physics professor who just got the RPL-165. There's also pictures he sent me showing his lecture with it.