Rock formation is as described and looks good, but the picture is deceptive. When I saw the picture here on the internet, I thought "Wow, that for 10" but when I then opened the package, I saw why it only costs 10. The rock formation is quite small and I do not even know whether my fish fit into the caves ... :-) So Caution: Do not be fooled by the picture. But otherwise everything worked great. The package has arrived after 2 days with me. Is but unfortunately still only 4 stars because it looks just much bigger as I said on the screen.