It is not suitable for 4 adults. The second bedroom is very small and cramped. We had to leave our suitcases in the hallway as there was no room in the bedroom. The bed is pushed up against one wall so one person has to do the climb over or scramble out the end of the bed to get out. It would suit one adult or a child but most definitely not a couple.
The lounge room furniture is more about form than function. Not a couch for lounging on. There are not enough chairs/seats in the lounge room for 4 adults.
The bathroom is also more about form than function. The shower is in the bath and the shower curtain acts as both shower and window curtain and therefore space in the bath/shower is restricted. The curtain needs to be pulled across the window unless you want the neighbours to get an eye full! The stool for the shower gel is outside the bath - expect to flood/drip all over the floor every time you reach for it.