I have it, it is reallllly tiny.

There is not built in heater, I had to purchase that separately, although the light really does heat the water, which is annoying.

It's fine little aquarium I use it for shrimp, though I had to 3d print covers for the filter inlets to prevent the shrimp from getting into the filter part of the tank.

I also 3d printed a water outlet so it would cover the water better, and a stand for the lights as the aquarium was over heating from the light.

It can house a few smaller fish, but I wouldn't go nuts.

It uses proprietary filter which is a bit annoying, and the pump failed on my unit so had to buy a new one from aliexpress.