To list a few things:
-BRILLIANT customer support.. Jack is known for going through a lot of trouble to make the customer happy. He replies very fast.
-Fantastic guaranteed high quality high output lasers. Sturdy, nice design. Stable output which is usually quite a bit higher than advertised.
-They check every single laser they send out for power, stability, beam diameter, divergence, beam roundness and several other things. They never send out one which does not fully satisfy their tests.
-They are way cheaper than many other companies. Probably the best prices there are for high quality lasers.
-They have an upgrade policy meaning you can send in your old laser to get a huge discount on a more powerful one. Here jayrob got 80% of the original value of his RPL 350 off when buying the RPL 375 by sending in this one year old RPL 350.
Optotronics hold there mw spec so well, they test them for a whole minute at the rated power of the laser. John Lawson's RPL 300 peaks at 450mw for about 20-30 seconds i think. Also they use a 2.5 Watt IR pump diode in all there lasers.
Just to throw a monkeywrench in the gears, don't forget LASERGLOW, incredible, class-leading quality, overspec like noone else (my Herc 350 peaks at over 500mW) and Justin has always been great with answering questions, customer service, etc - You may wish to check out their wares....