I'm currently using it to isolate an aggressive fish. It works. The construction is very basic -- 2 plastic rectangles connected by 4 plastic sticks, with a net stretched over it. The construction doesn't appear durable and I expect something to fail after several rounds of assembly/disassembly.The "hooks" to attach the net to the tank are flexible metal plates that you bend around the edge of the tank. It's ugly, not sturdy, can easily break, and don't appear replaceable. They don't hold the net evenly in place -- the front edge hangs 1/2" lower than the back. I had to lower the water level in the tank to ensure that the front of the net is above the water line.Overall, it's fine for occasional use and the price is right. But I'd get something better for prolonged use, especially if it's going into a display tank.
Rating: [4 of 5 Stars!]