We have the TS3. It will not stop everything, but it really improves the ride. I bought it for 2 reasons. 1) Improve the ride to the truck, it does. 2) Reduce the stress to the trailer frame, I believe it does since the air bags are between the truck and trailer. I do not think there would be much difference between the function of the BD3 or TS3. Just get the one that is suitable for your trailer.