Excellent package for its price. I own it for about 4 months but i use it rarely with no problems at all.
The tube its actually a 50~60W laser and not a 60~70w like on other brands.
The specs on this site states that 15~18 mw is the optimal operating current and at the same time it states that is ready to use it as is ... calibrated by the manufacturer... But in my case the current draw was 23mw and i had to calibrate it myself to meet the manufacturers specifications.
i hope it will last some time to earn its money .
Me 
