I'm trying out Tripsy now. Happy with the TripCase import although I'm not sure what I will use historical trips data for.
The UI seems good and quite smooth. Doesn't seem to be any reminder of check in times, but that is very minor thing as usually the airline's app notifies of that.
I haven't tried any importing of new trips yet, so will have to see if better than TripIt or about as good as Tripcase. TripIt was to be a bit irritating as it didn't recognize most bookings I made whereas TripCase was just happy to create trips from the same.

I'm wondering how Tripsy compares to Flighty. Anyone know?