I have an EZ-Pass and I would never be without it. It allows me to keep moving when everyone else is jammed up at the tollbooth. It gives me a substantial discount on toll prices over paying cash. I can log on to my account online and look over all my toll activity nationwide. It automatically detects whether I'm pulling the Fiver or not, and adjusts accordingly. I can't think of any single device I've ever gotten in my vehicle that is more useful (with the possible exception of the radio that connects to my cell phone via Bluetooth).