At CVG this weekend there was a mix of ASA and Comair over at the A concourse...was surprised though by how much ASA had grown there (and how Chautauqua has seemingly pulled back quite a bit from CVG, most likely to focus on Florida).
Living in GSO, I'm fortunate enough not to have to deal with ASA, with my lone experience on them being to the former DFW hub, which was fine. However, having seen Concourse C in ATL, it is downright ugly and I am very fortunate that the markets I fly to have mainline service for the most part (and I make sure I'm on the mainline flights).