I would highly recommend checking motels/ hotels near Santa Monica pier to price compare. The price for this airbnb includes sharing the bathroom. The picture only shows the bathroom partially. There is only a hands shower with the water being either too hot or too cold. The bathroom was the biggest inconvenience for the price this was quoted at. There are some great motels in the same area that might be more value for your buck.
You can expect the room to be very clean, well equipped with blankets, would recommend bringing your own towel. If the price was competitive to places around it, it would have been worth it.