I'm 9 weeks into an 18 week project at work that requires me to travel from Raleigh to Atlanta roughly 3 out of every 4 weeks. I've been loyal to CO, and now UA, for about 5 years, and typically average 40-50 segments a year. That said, I've never had a run of (what I'll call) bad luck like I have lately. I have lately been splitting my travel up between UA (RDU-IAD-ATL), and US (RDU-CLT-ATL) based on availability (and price). UA seems to price themselves out of business on some of these flights. Obviously ATL is a business destination, and those CR7's are constantly full, with just a few flights a day. Unless I book 3+ weeks in advance, UA usually wants $1200+ (if there's availability at all) vs. $300-400 on US. I've never been a huge US fan, but until the time comes that they formally leave Star, at least I continue to earn against and maintain my UA status. All that said, and I NEVER thought I'd say this... US is FAR more reliable. In three out of my last four IAD-RDU segments, I've been significantly delayed. My usual flight is scheduled into RDU around 23:15, once was almost 2am, and twice almost 1am. Last week, our flight was (according to our pilot) intended to be cancelled, until they decided last minute to cancel a TYS flight instead and give us their aircraft. Our flight was delayed roughly 40 minutes, and the gate swap (A2 to A6) was announced about 30 minutes before the new departure time, everyone lined up, boarding completed, and we just sat there. Bag carts parked outside, green-tag bags stacked up at the aircraft stairs, no sign of any ground crew. Twice the FO got off and walked around looking for ground crew. We sat on the ramp in IAD for almost 45 minutes before a ground crew was found to load our bags and push us back; and when they did show up they were clearly in no hurry. I've never seen a ground crew move so slow and nonchalant, especially given that a 10PM departure was still sitting on the ground well after 11PM and we were just waiting on them. Our ExpressJet crew was awesome; very apologetic (and as frustrated as us). The FO appeared to try and help one of the slow ground agents load the bags on the belt loader, but through the window it appeared that the ground crew sent him away and didn't want his help. As much as I hate to say it, over the last 8 weeks, US has done a far better job of getting me to my client and home on time, in better comfort (I'll take a new-ish A321 over a beat up E145 or CR7 any day), and more reliably. I'm in no way interested in moving away from UA or Star (definitely want nothing to do with the AA mess), but United... you have to try harder to do better.