We've had the Radian for years, since it was first introduced, I believe. Bought it for the narrowness for flight travel since we like to fly. Plus, it can fold if you need it to for traveling through the airport. However, we never folded it because it fit perfectly on the back seat of our Sit 'n Stand and my daughter would sit on it with my son in the front as we traveled the length of the airport and all the way down the gangplank. No Britax can do that, though we had those in our cars. We have always installed our Radian for forward facing children, so installation was never an issue for us. As someone pointed out, it is reinforced steel (very safe) but it makes for a heavy seat so if you plan to switch it back and forth between cars a lot, you might want to think again. Good luck!