Q Industries MF-1035 Santa Ana Portable High Volume 12V Air Compressor

• Inflates a passenger car tire under 2 minutes
• Includes 3 adapter nozzles for inflating sports balls, rafts, and toys
• E-Z twist brass inflator and 3 feet coil hose
• Powers directly from a car cigarette lighter
• Convenient nylon carry bag

I have used another portable air compressor before, and it sounded like WWIII was beginning. I also had to keep a foot planted on it to keep it still. Not the same story with this compressor. Yes it makes noise. Yes it vibrates. They all do, but with this compressor it is all done at an acceptable level. A reasonable amount of power lead, which reaches all 4 wheels of a 2007 Toyota Camry. I have to get the compact spare out of the trunk to fill that but that is not a problem.
Unlike some other pumps, this does not have a plastic lever to clip the air line onto the tire valve. You press the line to the valve and screw the sleeve on. This is all made of brass. It can be a little fiddly but again, I don't consider that a problem. In fact, I found a reason to make it a positive. If you are only topping up a tire, there is no need to screw onto the valve at all. Just hold it onto the valve with steady pressure, the same as you would do at a gas station. Regarding those who feel that you lose pressure while unscrewing the sleeve from the valve, then as another reviewer stated you can slightly overfill. Personally, if you hold the airline onto the valve as you unscrew then it releases practically nothing. Then simply whip away the airline once completely unscrewed.
It all packs away in a hard wearing nylon carry bag that is supplied, and allows you to keep the nozzle accessories with the compressor should you need it for other jobs such as rafts etc.
So, for the working noise, vibration, store-ability, and the budget price I'm pleased with my purchase. It does what I need it to which is to keep the tires at the correct pressures on my car.
Final note. ALL gauges that are fitted onto the pumps have a discrepancy tolerance. Always use a separate, accurate gauge to check the pressures. Once you know if yours is over or under reading and by how much then you can allow for that on the gauge on the pump, but I'd still check that that doesn't change over time.

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Once you give this air compressor a try, I would guess you'd like it. Short summary of pros and cons:

Pros:
1. Super compact, this thing is like 8 inches long by 5 inches high
2. Powerful enough for sedans and compact cars (not for trucks!)
3. Does the job
4. Nozzle literally screws onto the tire valve stem, which ensures no loss of air and a PERFECT fit (far better than the models where you flip a plastic latch) and you don't have to hold the nozzle in place manually
5. Steel construction for the most part

Cons:
1. You have to make sure the air pressure in the tire is low when you start, otherwise it won't start (and you may burn out the fuse)

That's it, very few cons. If someone buys this and complains about the "power," I would call that an unfair review because this model is not designed for super high air pressure (it's $31). If you want more power, you have to be willing to pay more.