Bests & Worsts Reviews from Amazon

I have owned half a dozen tire inflators through the years. I prefer the auto-stop units but they are in the minority, most have analog dials and flip type clamp tire valve connectors. Pros: 1. Auto-stop works - It stops exactly at the pre-set pressure 2. Gauge accurate - The digital gauge is within 0.5 psi of a handheld gauge. 3. It is NOT loud - Many of the reviews claim this unit is loud. Well loud is a relative term. Compared to what is it loud? It is actually about 80% as loud as my other units of various brands so overall, it's quite quiet. ALL portable tire inflators that I've heard are loud. The Slime is actually quieter than the average 12v unit. 4. Has a lighted display - I was very surprised when I plugged it up that a bright green light lit up the display. NONE of my other tire inflators are backlit. If you are not in bright light, then you must shine a flashlight or cell phone light on the display to see it in dark or dim light. You can easily read the Slime in total darkness. This is a super plus if you ever had a flat at night. 5. The screw-on was not as bad as I thought. All of my other units have the quick connect flip-type tire valve connectors. They are very quick to connect and disconnect and I thought the screw-on would be much slower and a big disadvantage. I could almost connect and disconnect the Slime as quickly and easily as the flip-type. Some of the other reviews stated that the flip-type won't work on some smaller clearance valve stems. I am perfectly happy with these screw valve connectors. 6. Big cord compartment - With some of the other inflators it is almost impossible to get the 12v cord and air hose back into the storage compartment. With the Slime it is fairly easy. 7. Inexpensive - I actually bought 5 of the Slime inflators, one for each of my household's cars. The price is very reasonable compared to others and this one is far better than any I've ever owned at any price. 8. Low vibration - The other units have a tendency to vibrate heavily and dance around on the floor as the tire is inflated. The Slime seemed to dance less than other units. Cons 1. Instructions are not intuitive - I actually printed labels and stuck on each unit so that no matter who used it they can easily operate it. Slime needs to put a label with instructions on each unit but to be fair, not of the other units have instructions on them either. These are the instructions: 1. Screw on tire valve 2. Plug in 3. Hold + or - for 5 sec until flashes 4. Set desired pressure 5. Push ON 6. Reads current tire pressure then auto stops at preset 7. Push off/on for next tire 2. One of the buttons is labeled "M". There is no indication in the manual what the M button is for but it switches the readout between PSI and Bar units. 3. Larger than some units. I have a motorcycle and this unit is too large to fit easily in the bike storage compartment. It is not large to carry in a car but for motorcycles it is rather large. It is smaller than most 12v tire inflators but there are units about half this size if space is a problem. Slime makes a motorcycle inflator here: http://amzn.com/B000ET9SB4 If it's going in a car, van or truck, this is the one that you want. Overall I am super impressed with this unit, that's why I bought five of them.