I've been using advanced as my primary light source for about a year and a half now and I have nothing but good things to say. They perform very well and are quality built. Ive used the 180w extreme flower and 200w diamond seriers, both have been great. Some will tell u dont bother because you can get from their supplier direct from china for cheaper, but I like dealing with us based companies for customer service issues, on that note, the lights work perfect and haven't had any issues with them. I will continue to buy from them as my experiences has been nothing short of satisfactory, but I also have a few other companies on my radar as well. Let me know if you have any specific questions, happy to help, not many advanced users on this site besides myself.