Ive used TripIt for several years now, and I love it as a "wallet" to track my trips in. Very convenient on my iPhone and iPad.
Two points:
1) On the iPad, I wish it would work with the size classes so I could have it in one window while I cut-and-paste information. When I use a B&B instead of a hotel the TripIt people cannot parse the email (cant blame them, To many unique formats). Also its nice to be able to have it when your browsing to figure out other things you are doing on your trip. I end up using the calendar app and having my TripIt calendar visible there, but it would be nicer to do this with the app.
2) I had signed up for TripIt Pro because I had a few trips coming up. After two trips in the free trial period, I realize it added nothing to my travel experience. I already get notifications from the airlines I used, so that feature was not helpful to me, and I didnt use the other features.
Other than those two points, a great app.
tvf about TripIt: Travel Planner, v8.2.1