Awesome to use, but absolutely stinks the van out! None of my others brushes smell, but for some reason the boars brush has a horrible stank to it, like an old sweaty damp sock. I've just washed it but I can't be arsed to have to properly wash it every night. Ps. Jake I used that green unger sill brush today lol, stiff brushes, but I love it! I find stiff bristles much better than flocked bristles personally, especially on bird poop, I hope they won't damage window seals though!