Personally, they are way over priced for what they are, sure, the LED's are high powered, but once you shine the light into space it looses its intensity, so, therefor it must be shined into the ground or nearby surroundings, there are alot of cheap stuff coming in from China that you must be weary about but, also there is some great quality also from China, how do you know which one is the right one, easy, grab a hammer and smash the lens, If it breaks, its only plastic, if it doesnt ,its polycarbonate, this will give you some sort of indication that the components that make up these LED light bars are some what reasonably good quality.
I am a big fan of HID's I want light so that I can see, Light bars are not for everyone and nor are the HID's, do your homework and dont jump into it cause Bazza down the road has them.