I have used it to get low bridge clearance converted.
Edit
remember the conversion will not help you avoid things while routing it will warn you when approaching something. go to preferences in tomtom and make a distinctive sound for each. If you tomtom is like mine then you can RECORD a message for each. For example my low bridge warning is me saying LOW BRIDGE, LOW BRIDGE, LOW BRIDGE and it will occur 3000 feet before obstacle.
Traveling with my best friend my wife!