Cavernous airport with insufficient seating in many areas. On the two occasions we have flown from the airport recently the temperature has been absolutely unbearable with air conditioning totally ineffective and passengers stripping off and fanning. Outside the temperature was much lower than in the airport which heated up like a greenhouse. Announcements are incomprehensible perhaps because of the echo in the huge spaces. In the car rental areas the ramps are incredibly narrow causing difficulty in particular to those driving their cars for the first time out of the airport. Have been travelling several times a year to Alicante for 11 years. Our experience in the old airport was always excellent. Only improvement is perhaps the number of toilets but in general our experience of departures from the new airport has not been a pleasant one. We have also experienced the arrivals area - meeting friends and family coming to visit. In such a huge airport this area is minute hard for those waiting and those arriving not to fall over each other and nowhere to sit except 2 small cafes. Can we go back to the old airport which is still sitting next door?