I will start by declaring that I am a great fan of Griot's Garage products.  They make a range of car cleaning and finish-maintenance products which work and which, of equal importance, I feel are SAFE to use on my car.  Based on my experience in using their products for years, I use them with confidence that they do not contain harsh chemicals which will damage the finish of the paint, leather or plastic surfaces of my car.  They are expensive, but I find that I am more comfortable using Griot's products that many off-the-shelf, less expensive products sold at Auto Parts stores or large chain/discount retailers.I am equally pleased with the Interior Kit, consisting of Cleaner and Vinyl and Rubber Dressing with applicator pads and cloths.  The Interior Cleaner works.  A stubborn stain may require multiple applications of the product, but I would rather apply a milder cleaner several times than risk damaging a surface with a stronger cleaner.  That said, my personal preference is to use the Griot's dedicated leather cleanerGriot's Garage 11142 Leather Care - 16 oz.for my leather surfaces rather than a more all-purpose cleaner such as the Interior Cleaner even though it says it is safe for leather surfaces.The rubber and vinyl dressing works well.  I have applied it to the rubber door and trunk seals on several cars and the dash on one car.  I like the fact that there is no pronounced smell or excessively glossy surface when applied to plastics (unlike Armor All).  Before applying the dressing to the rubber door and trunk seals on cars that are a few years old, it is wise to clean the rubber thoroughly using the Interior Cleaner or Griot's rubber cleanerGriot's Garage 11136 Rubber Cleaner - 35 oz..The microfiber towels work well and although the sponge applicators perhaps do soak up some of the product, they are often the most convenient method of applying the product.  In any event, I would not soak the sponge applicators to the point of saturation, however, as this could lead to drips and waste of the product.  Further, any of the product that migrates deep into the sponge can always be released by merely pressing a little harder on the surface to which you are applying it.In addition to making good car care products, it also may be useful to some to note that Griot's is also good at sourcing and selling hard to find or extremely useful tools.  I have purchased many over the years (e.g. solid, machined aluminum, lifetime water hose sprayer, no-drip caulk gun, a cam-locking bed separator gate for pickup trucks, etc.).