I have used this for years and it is by far the best surface cleaner. It will dissolve all the tough grime from the bathroom and the kitchen and will not scratch the surfaces. That's why I use it instead of baking soda of which I was a faithful user until it ruined my sink :(
Just sprinkle on the surface like you would with any other powder cleaner and scrub away! It has no odor, which is another plus for me and washes off easier than baking soda. You can't beat the price too!