Yes it looks good and is practical too.
I am the same as you, bought complete set-up, but I would like more lighting for my plants.
I only have a 2" X 1" tank, don't think I can get another tube in this hood.
I have seen them for sale on ebay.
I reckon unless your going for a heavily plated aquaria with hard plants to grow or saltwater corals it would be the way to go but otherwise of normal tanks with normal lower light plants it'd be best to go with maybe something with one tube + reflector.
The light on the picture looks like compact fluorescent - which is a HO light (which is good). I currently have the standard 20W bulb over a 30G tank, but I would like to replace it with a new HO hood. If one has plants, and wants them to grow well and fast, a HO lighting system is the way to go.
Well, I have read a book about growing natural fully planted tanks successfully without any CO2 injections. If you're interested, it's called "Ecology of the Planted Aquarium: A Practical Manual and Scientific Treatise for the Home Aquarist" by Diana L. Walstad. You'd be surprised how beautiful planted tanks this woman can grow using only natural means. It's amazing.