It's really hard to say without more info. The pix are also pretty fuzzy so it's hard to peg details that may help more.
It looks like he has some opaline or blue gouramis which may or may not be suitable for that tank. They get to be about 6 inches at can be aggresive, if there are 3 in that tank(which I think is what I spotted) there may be some aggression issues down the road if they are not mature yet.
The water level is a bit low which may have a reason(because there is no top perhaps) but this also means that he's taking a tank that is X gallons and making it even smaller. It may not have enough water volume to support these fish. Without knowing the size of the tank it's hard to say if these fish are suitable for the tank either
I don't recognize the filter so can't say if it's suitable or not either.
Seems like thats a bubble blower on what It hink is a windowsill. Which really isn't needed. No harm in having it but gourami can breath from the surface and with a water level that low there is a lot of surface agitation anyways. Again it's no issue to have it.
Personally I would say no. It seems like a bit of a mash of decor in there and it's just doesn't seem like a great set up. Though again without knowing more details like what filtration he's running, what exactly is in the tank and the size even it's hard to say for sure