I have one under the "Odyssea" name, that I got on eBay. It's a 4-tube 48" T5 fixture.
Light output: 7/10.
I've changed all four bulbs since I got it, mostly because I wanted a different color temperature for plants. It came with 2 x 12000K and 2 x Actinic, which would have been fine if I didn't have a freshwater aquarium. The reflector design is the ultimate in "cheap", but gets decent amount of the light in the right direction. I haven't had any problem with ballasts yet. (In about 4 months so far).
Construction: 3/10.
The first thing I did was disassemble mine. I ended up re-routing a few poorly routed wires. I tightened several mounting screws for the ballasts. I also had to modify a mount for one of the cooling fans, which had a malformed plastic tab that prevented it from snapping into place. All the wiring looked as thin and cheap as possible. There is no question this was manufactured fast and cheaply.
Design: 5/10
I ended up hacking the inside part of the tank mount clamps off, so that I could use them with a glass canopy. The light is well-weighted, and stays stable even without the full clamp. The outer shell is somewhat metal-ish and solid. It includes a plastic splash shield. The bulbs are somewhat tightly packed together, and the endcaps and wires are mashed together worryingly tight. The reflector is super-thin and I suspect some kind of coated plastic. This wouldn't worry me as much if the whole unit didn't get so hot under full power. The ballasts are packed inside tightly to the point of restricting air flow, which is provided by a pair of muffin fans at one end. These seem to turn on if one pair of lights is one, but is not affected by the other pair (odd wiring choice).There appear to be vents for two more fans at the other end, but these are left unused and partially blocked by the ballasts from the inside. Separate rocker switches (on my unit) for each pair of lights, and the night LEDs is a nice feature.
Overall: 5/10.
The price is the main selling point. It's hard to get a complete commercial T5 solution in this price range. The product is passable, but not a good choice if you want as little hassle as possible. If you don't mind a bit of fiddling, you should be fine.