I have got one - mine is made by Wagga - but I have to say that I don't use it much nowadays ...
I got my two a pair of coats with fleecy linings and ordinary cotton tops (not the waxed sort) and I find that these absorb a lot of the wetness whilst keeping the doggies mobile and warm - a good towelling-off usually sorts the legs out, but unless they are completely exhausted, they don't think much of being incapacitated inside a 'dog bag' and usually try to squirm around the house like an enormous grub or something !!
Their coats are quick and easy to put on, and because of the fleecy inner, take the moisure away from the coat - they are easy to wash and dry and I think are a lot more versatile than the bags .... the dogs can also groom themselves and get stuff out of their paws etc whilst wearing them which they can't do with a bag ....
I have heard some reports of the zips on the bags jamming, which can be fairly frustrating I imagine, although mine works fine ....
