I have, on Sunday he wanted to be in the garden with us so I used it for the first time. Even after an hour, the coat felt cool to touch and if I slipped my hand under it, T felt cool too. I bought that one as it had good reviews - it is lightweight, doesn't make his hair wet, and can easily be 'recharged' with more cool water. My only complaint is they reduced the price by about 20% between the time I bought it and yesterday when I posted the link!
Which one did you buy Joanne? The link takes me to several all at different prices? Thanks.