I had Smartires on my last motorhome, added when I installed new tires. They worked fine, and also gave you the tire temperature. Out of sight, but difficult to replace if they failed. Now I have Pressure Pros on my current rig, they also work fine but are exposed. This means easy to replace, check, or steal. Installed because motorhome was bought new, and didn't want to pull the tires. If money was no object, would probably go with the Smartires.