Well, then I guess it's at least good for my Mauser which I have a lot of corrosive ammo for.
The idea is to decrease the use of chemicals and make cleaning easier. If it doesn't work, then it's back to normal. I have problems with dizziness so I'm sensitive to chemicals. I wear gloves, but I don't really feel like wearing a respirator for an hour or more while I clean my guns. Plus I'd have to buy filter refills all the time.
Is cleaning with water easier in your book? Maybe not. You have to run some Hoppes down to break it up, run the water device, drain it, run some dry patches, force air down it, then go back to it later to run another dry patch or two, then run some lube down it. PLUS I have to clean the receiver anyway, right?
So maybe it's not for you. Maybe it's not for me either, but I'm going to try. Maybe I'm too thorough in my cleanings, but I can spend an hour on just the AR, not including the other guns I usually shoot on the same outing. I don't particularily like scrubbing the barrel, running wet, running dry. Still extremely dirty, keep going, still dirty, keep going. And like I said, avoiding the chemicals as much as possible.