I don't know about Berber carpets because we have hardwood. We are very pleased with the service and price of Merry Maids. They come to our house every other Monday and clean everything. They alternate weeks like one week they'll concentrate on the window sills, door jams, tops of drapes along with the normal routine cleaning. The next week they'll focus on blinds and screen doors along with the routine cleaning. They use all their own products and if you're not 100% satisfied, they come back the next day and make it right. (I sound like I work for them, LOL, I promise I don't).