I don't have one personally, but they are pretty common in the part of the shooting world that I frequent. everyone I know that has one loves it, the only downside is that they are heavy.
If you are never getting on a plane with your guns then they are probably overkill.
I have a good friend that has had the same one going on 15 years. I would guess it has been on 100+ flights around the country and the world without any issues. They are expensive but built like tanks.
I have a 2 gun Americase for my O/U's. Mine is he Premium line. Bought it in 2005 before my first trip to Argentina. They are outstanding. Yes they are heavy. They will last a lifetime. What else do you want to know?
I have several and they are good cases but not near as heavy as a Bear Tracks. Bear Tracks is like a Ft Knox with a handle. I don't believe they are made anymore....