Anyone use a cooling mat?

Yesterday it neared 100 degrees here, and since my central air unit isn't going to be fixed until mid-May I am looking for something to help Chloe with the heat.

Of course I am using fans, giving her ice cubes, plenty of water, short walks, staying out of sunlight, kiddie pool, etc. I know there are cooling vests and bandanas, I am not interested in those at this time.

My question is about those dog cooling mats they sell now. I saw two kinds: one with gel beads you soak in water and one that you fill with water. The gel bead one looks better but they are quite expensive so I am looking for any feedback any of you may have. I have been to both Petco and Petsmart (4 total) and they don't sell them in the stores near me. To prevent shipping costs I would like as much feedback as possible.

Did your dog like it? Did it seem to work? Did they really stay cool for 7-10 days? Where did you get it?

Thanks!!!