Though DFW is a considerably bigger airport, I think it's easier than Love when flying CO. Continental is at the end of Delta's Terminal E, which is now largely deserted because DL no longer has a hub here. Parking, counter, and gate space for CO are very close at DFW -- much closer than Love -- plus there is a President's Club by the gate. CO also flies mainline aircraft to DFW, which would save you the hike over to Terminal B in IAH (where all the Express flights board). All the rental car operators at DFW are consolidated into a new facility, which is reached by an airport operated bus. At Love, the rental car companies run individual facilites, which are scattered around offsite. Note, however, that taxi time at DFW is always longer than DAL because there is so much more traffic at DFW.