I am a car and car care nut.  I have shelves of products.  No, make that a whole closet full.  The best features of this kit are the excellent packaging.  The products, themselves, are just OK.  My overall rating is 3 stars.First, I'll say something about the packaging.  That is one of the best features of Griot's products. For example, the Speed Shine comes in a nice wide-base round bottle with a quality sprayer. When you are detailing a car, I can't stand cheap bottles with junky sprayers that are thin and fall over easily. Often, you are carrying multiple things in your hands and need to rest the bottle down on something and having it fall over all the time and dribble out or pick up dirt is just irritating!  The bottle is very high quality and clear so you can see how much is left and where the end of the pickup tube is.  Similarly, the clay come in a nice, screw top jar with ample space.  Every other clay I've used comes in some cheap cellophane wrapper or some tiny box and getting it back into, well, anything to protect it is nearly impossible.  Hats off to Griot's on the packaging/containers.First up, this contains a generous lump of paint clay.  You can read about claying a car elsewhere but the basic idea is it's a very good part of the prep process for polishing/waxing a car.  The clay in this kit is of a fairly mild type.  It's kind of hard to explain, but there are aggressive clays that are for really poor condition paint that will also start to remove sealants and such, and there are mild clays which remove less contaminants but are more gentle on the paint.  And, there are some in between.  This follows the tradition of most Griot's products that I have used in that it is mild and relatively fool-proof for the beginner but better suited towards well-maintained cars.  The generous lump can be kneaded and used on many cars depending on the level of dirt/contamination.  High rating for a mild clay that can be used frequently and comes in a best-in-class jar.This kit also contains 35oz of Speed Shine which can be used as a clay lubricant.  Speed Shine is technically a quick detailer for used on a slightly dusty car with microfiber towels, but in this kit, it is used as a clay lube.  There are a lot of products that can be used as a clay lube.  In this case, this product works fine.  I also used Speed Shine as a quick detailer (its original use).  For that, I was less impressed.  It seemed to leave a lot more streaks and the lubricity was not as good as competing products that I've used.  The bottle and sprayer are excellent, though.In sum, this is a good, but not impressive kit.  I would be tempted to just buy the clay separately.  There are other better quick detailers out there (Finish Kare #425 is one of my favorites), but if you are new to detailing, this kit will serve you well, and you will appreciate the quality containers which you can reuse.