Kept one in my DCU pocket at all times while on patrol. Anytime I thought it needed a quick wipe I ran it through. I usually run it through 6 times when detail cleaning, then a patch with oil before racking it in the arms room.
They are a great bit of kit and I use them in .308, 9.3mm and 12 bore. They are a good fast way of acheiving a 99 percent clean in one or two pulls. To deep clean a gun, or rifle though you still have to go back to basics. If you are thinking tour, and a quick pull through, its a million times better than the issue pull through.
I swear by them: before and after every shoot I chuck one a couple of times down the barrel of my rifles, along with a squirt of Brunox on the gas parts. They get a proper clean when they actually need it (in civilian land, more barrels get wrecked by over-zealous cleaning than by shooting).
Just don't get any grit on them, for obvious reasons.
Also, do not put anything in the loop on the 223/5.56 snake: you will get it stuck. You can put a patch through it fine with the bigger ones though.