I've flown into and out of Denver several times. Since we live overseas we always arrive at Denver after at least 30 hours of traveling and late at night. However Denver is one of a few airports that I land at after a long trip and do not feel like I'm cramped stressed or outdated. The terminals are very large and spacious and allow a large amount of natural light to illuminate the area. Even during the height of the holiday season when there are hoards of people flocking to Denver the airport gives the sense that it is never really crowded. Even the train system is rarely jammed with people. Despite that the problem that always seems to hit me is that my bag is always delayed or lost. After traveling for 30+ hours the last thing you want to do is wait for your bag or even worse be told that it will be delivered the following day. My suggestion is that Denver needs to find a real solution to their baggage problems. The "new" system has been a complete failure and United will no longer be using it because of maintenance costs.