This digital tire pressure gauge is very easy to use, has a big switch so you can see it and an auto shut off which is good. It has a larger display and is easily visible even in bright daylight. I use a PSI gauge, although it has four different pressure units, the tire pressure readings have been accurate every time I've tested it and compared it to other good tire pressure gauges. Its unique design fits perfectly in your hand and is easy to use. It also has a heavy-duty power window and an easy-to-use security lock, which will come in very handy during an emergency evacuation. I also like its red light which is very bright and will be useful on the street at night. Waving it alerts you to upcoming traffic. There are also other small tools attached that are a bit more difficult to pull out. I like the tire tread depth sensor and seat belt cutter. It doesn't have a storage pocket which I would like as it makes noise when it hits the plastic in my glove box. Also, AAA batteries are not included. Other than that, it's the best hand tool I'll keep in my car and I love it.