 Nothing really this is a true 5 star hotel 
 As we are big Tom Dixon fans we truly enjoyed the design of the room as well as the whole interior of the hotel Not just beautiful but also feel good and with the right touches from decor to housekeeping Been in London few times now and the location of Mondrian London is excellent being on South bank and with the Blackfriars station few steps away it s easy access and what is more great starting point for exploring the city The hotel is truly amazing Our room on 15th floor was exqusite spotlessly clean comfortable and with a gorgeous view on Thames St Pauls and the City The customer service is examplary like we ve never experienced before our big thanks goes to the staff who arranged the special birthday surprise and welcome gift we will never forget that all in all it was absolute delight staying in this beautiful design hotel 