I saw PIT as one of the best airports. I was in PIT not long ago and found it as a very new and clean airport. I thought it was a nice one untill I talked to a local. He said that he flies to Europe alot and he said the way they designed the International terminal was very bad. Especially when he is picking up his wife up from an International flight. He had to take 2 of many luggages that his wife brought and go down to the only way they got,the escalators, he usually made at least 3 trips because of that. He was quiet mad about this.
IAH-I fly out of here all the time, I found no problem with it. It is an old airport, they are doing some remodeling. about the CO Express section, it is actually not that bad, just the checking area is very hectic because of all the construction.