mmmmh i'm not sure that i will share your mind about Aixiz.
I bought one of their 50 mw unit in August2008, and i receive, in france a 30 mw unit (see post in the thread). I asked him that i prefer to have a 50 mw , he said
"I will but I cannot until we receive some more units from our customer." should i send back the laser?
"Yes, please. We will refund you the shipping cost." i posted the unit 22 august 2008 shipping cost=10$
8 November 2008 (3month later!): no newz, i asked him if all is ok because i know that there was a thunderstorm in houston
i got a response (12 nov): "Your unit is on our lab bench now and a replacement will be shipped tomorrow."
6 jan 2008 (2month later): i write
"Dear Chuck, i have no received the unit yet, i usually receive my items from USA and China in maximum 2 weeks, and your last message is 2 month old ! I suggest you to refund me this will be a faster way to solve this problem, it's to much time i will ask paypal and ebay about this problem"
"That is really strange since we sent a replacement. I will check....I will do one better, refund and send you a unit as our apology for this problem which should not have happened.Chuck Maricle"
i got my refund of august 2008, few minute after i send my last email, not refunded of the return of 30 mw unit, and no "apologize unit" received at this time, i don't count on that in fact
So im a little disappointed about this story, their 50 mw unit were great. I never had problem before when i purchased aixiz module and optic, maybe they have little problem with their laser ? dunno