My tires were repressurized within 6 minutes. There are many, many, many potholes in the streets around my house. If I'm not careful I can very, very easily lose pressure or lie flat. Using a public compressed air machine sucks! I wish I had my own portable machine to get the job done, especially when it's at night and I'm away. We tested it to see how long it would take for the pressure to build up, and the results were impressively accurate compared to what the company claimed they could do. Hello everyone! Get this for your car emergency kit today!