This could be made a lot better. The bristles aren't shaped in a way that works well to get in the crevices of a pet's paw. The bristles are all flat on the ends which makes the cleaning action less than perfect. I think that if they were slightly smaller and possibly with rounded pointy tips this would be better suited for it's intended purpose.
Don't get me wrong it does remove a majority of the mud. My pooches paws are a lot less offensive on a wet rainy day now that we own this device! It helps to cut down on the mess created by him tracking in tons of dirt. I have a 10-month-old son that spends a lot of time playing in the floors at home with the pooch and this has helped tremendously to ensure that my son doesn't get wet and icky after the dog has just come back inside from a walk. That's probably my top reason for continuing to use this item. I do wish that it did a better job of cleaning in between the pads of my dog's feet but it's not a deal-breaker. Though if I found one like what I have in mind I would trade this one out for the design that would better clean my dog's feet.