AHHHHHHHHHHHHHHHHHHHHHHHH! Yes! I've been excited for a tank that has a false wall to hide the filter. I've been sooooooooo excited and waiting to buy this for my little fishy.
I like the fluval spec, but there is another tank the same size like this. It's called the Betta Nano Cube by J&M. It does have a lid but I think you will be able to purchase one separately. The lights are dim-able LEDs and nice rounded edges whereas the Fluval Spec has aluminum frame.
Betta Nano Cube
The Betta Nano Cube is acrylic while the Fluval Spec is glass. I am excited for these tanks to make it to the U.S. soon. They will be expensive, I'm estimating around $65 in the U.S. since the U.K. price is £50. I think the Betta Nano Cube will be just as expensive. That makes me sad :( but I'll still probably get one.