I use depuit 2 years.
lazer that works well but hlas Ragit the room temprature for the best performance it must be cooled properly because the head does not support the temprature suprieur 23c, if not lower power even below 19c.
It temprature I is measured on the head is cooled by a small fan.
This problem of varying brightness I rsolu by making a small electronic kit, (a thermostat) that I have a connection lment pelletier (component sold in stores and electronic redroidit that on one side) I have the face that al redroidit on top at the back of the head of the march lazer and depuit
(Normally the heads of this power is a redroidit lment pelletier)
if not if your lazer defects of the face, which mirror Ragit but not this happened the solution you open it and the brush you clean the PCB with alcohol burned (Color me his yellow nicotine while fat) you leave it well Schett (me one day) and all should re-run.
I for fat between the air filter

good report quality price (but if I had not used Found 450 euros (without separation because the person because of pb is that I sit I would have expected because prices will fall further
100mw !!!!!!! it's like the powers of speakers they tend swell.