I used this on a customers cloth seats. But while it did a very good job of raising ground in dirt while not at all hurting the fabric, it left the nasty smell behind, that my customer still smells a month later. Luckily he was a good sport and said he can live with it until I do my next detail of his car, but even I had to eventually switch to a different brush because it stank up my detail cupboard. Apart from the smell, it did do a great job, but it's counterproductive.

Used this mainly for Weathertech mats among other interior surfaces. Only downside is that it has this unpleasant smell for some reason. Great brush for pretty much everything but leather. Would recommend.

Great brush for interior. Is soft enough for all interiors and you can see the dirt being absorbed into bristles - meaning it is working!