First, if you're going to make sweeping statements like "WILL BURN YOUR HOUSE DOWN--DON'T EVER BUY IT", please provide some backup for such statements, like links that provide factual evidence of such disasters. By failing to do so, you lose credibility and further the dissemination of incorrect information. I would worry more about the cracked-out, home-made, hobbyist-wired lighting fixtures and retrofits that many hobbyists put together than this Odyssea fixture.
Second, I purchased the 48" Odyssea 2x250W HQI fixture for my 110 gallon display (48"x30"x18") in December 2007. This fixture replaced six 54W T5 HO bulbs (4x10,000K and 2x 460nm actinics). When Aquatraders sends you the fixture, it's my understanding that the bulbs are whatever they have available at the moment. Mine came with 20,000K bulbs, which I think makes the tank look great, but this is a very subjective issue. My corals (softies, shrooms, and LPS) had an immediate and positive reaction to the change in lighting--they have never looked happier and I have seen pretty good growth of my softies (my LPS are too new to notice too much growth). I am thinking about replacing the 20,000K bulbs with 14,000K bulbs, as I think the spectrum may be a little more conducive to coral growth. So far, I have been very happy with this fixture. The bulbs fired up immediately, the fixture and ballasts run cool and quiet (the ballasts are warm to the touch, but by no means hot).
As to the comments, "My ballast burned up after a year--I would never buy this fixture again", think about that statement--If my ballasts quit working after a year, I'll replace them with IceCaps (I've read on Reef Central that switching from the stock ballasts to IceCap makes a world of difference, but I have no personal experience to back up this claim). Considering I paid $359 for this fixture and the next cheapest comparable fixture (Aqualight Pro or Coralife) is at least $1,000, I'm not too concerned about the possibility of eventually (tomorrow or a year from now) having to pay an additional $240 to buy two IceCap replacement ballasts.
As to the comment, "The bulbs are just blue"--no, they are dual actinics.
Although I generally agree that you get what you pay for, I can honestly say that I think I got a GREAT deal on a quality MH fixture. Could I upgrade the ballasts and get more/better light? Maybe, but my animals are doing great, so why bother?
Andy