If you do a search for odyssea lights on here you will find many threads regarding their worth.
I personally use em and love em. I have never had a bad unit yet, and have several friends that use them also with no complaints.
I just got a new 36" mh/pc fixture for a new 65 gallon tank that I am in the midst of setting up. I opened it up and checked it out after arrival, and all is perfect. I got mine from the big site where you bid on stuff from a seller named hombby