We can not control the temperature of the room adequately. This is mainly true with warm weather and we can not properly down de air conditioning
The restaurant is a"green" place (no smoking area)!
The ventilation of the internal corridors is weak, mainly close to the elevators where there is a not good smell (transpiration?)
Sheets were not 100% cotton, and my mate is allergic to it... most hotels in that category have 100% cotton sheets
The staff, the offer of minibar and coffe at the lobby, decoration/arquitecture and the organization of spaces
The quality of the air: the corridors without fresh air and smoking at restaurant and living room (this is a weakness of Spain: most of the spaces (including restaurants) are smoking!)
Total absence of smoke in the entire hotel
Smoke in the public areas