We just received our 6.6 today and it is absolutely awesome for the price listed. The light is a 7200K light and plenty bright enough for just about any plants that i have with no Co2 running. We are opting to go with a small sponge filter from Truaqua that we ordered last month http://www.truaqua.com/aquatop-inter...er-caf-10.html
, it's tiny but plenty big enough for this tank. Main thing is the small sponge filter doesn't take up much room and the flow is fine for a betta.
On the back of the hood it has a swinging door that you can lift up to insert any other type of filter you like, and for cords to go through. Most lids you have to saw off the plastic pieces to fit your filter but this one just lifts right up.
I'm really impressed by it, no idea why it's this cheap.