I bought this to air out the tires after off road. Boosts standard 32" Rubicon tires from 20psi to 37psi in about a minute per tire. The product heats up. It takes time to cool down but works great. The in-line gauge reads a little more than my sample gauge and doesn't give an accurate reading when full, but found it to be road pressure once it reads 50psi while running. Definitely recommend this model for the CFM rating, that's why I bought this model. Filling a conventional car tire takes even less time, maybe 20 seconds. Good product. A bit bulky and unfortunately just a bit too big to fit under the back seat of the Wrangler Unlimited. But the benefits more than make up for it. The 90 degree tire valve assembly can be a bit longer, sometimes needs to be rotated a certain direction to get a good seal, and if you're going to be touching the rim a lot, a straight filler neck would be the ONLY recommendation I would give. It could be a problem with the bead locking rim.