400watt hps reflectorized bulb worth getting??

what do you guys think about the bulb. http://www.htgsupply.com/Product-Reflectorized-400-watt-HPS-Bulb.asp

hi never used one but looks interesting the theory sounds good, perhaps see how many other places sell them etc there again they are not that expensive to perhaps try one out, be nice to run side by side with normal one to see diff, keep us all posted if you get one,

well if its as good as they claim,then yeh,why not give it a go.i might do in the future.