anyone own a cordless impact gun?

We have 4 of the dewalts ones at work and IMO they are garbage. They wont even pull a 5" lag bolt out of a 6x6 timber. For much more than lugs nuts, they suck. And even at that, for us they suck. They do not develop anywhere near they rated torque. All in all, I will stick with the IR air impact. Much better, but you gotta drag the hose around.