Should I Add Undercoating?

Angie writes: I am purchasing a new Civic next week and was wondering if I should have it undercoated. I have heard pros and cons, but would like your input.

Mike:
As a former tech, I hate undercoating because it makes it hard to work on anything that has been sprayed. It also adds unnecessary weight to the vehicle that makes fuel economy suffer. New cars have great corrosion protection from the factory, and a great corrosion warranty to back it up. They do this because unless you live in a rust belt state, they never rust anyway! There is no way I’d undercoat any of my vehicles.