So all in all I bought this in place of the Mac Tools Air Chuck that I needed to replace. It's lighter, thinner, uses AAA batteries instead of watch batteries, is more accurate, comes with all the fittings for all the tires and a quick release for changing which I thought was great, has a little light which I found odd but it really helps with double venting. It's not as durable though, has a lot more features that can be confusing, and can't be used to deflate tires unless it's hooked up to an air compressor that my Mac could use, and it also adds air much more slowly . They're about the same price, but overall this one is much better and comes with a 1-year warranty.