most adverts show pictures of the interior (and usually balcony/view) of the apartment available to rent, choose the interior which looks like something you would like to rent. apartment owners should not show pictures of any other apartment except their own, unless they state it is an 'example'.
look at the standard of furniture, cheap with plastic tables or well made, expensive furniture - then make your decision. also price will feature - if you pay very little, dont expect a lot!!