I have been using Griot's Car Wash (started out with this very kit) for years. In fact, I first purchased this product from Griot's when it was announced as a new product several years ago. I was already a user of some other Griot's products (Speed Shine, etc.) and trusted the brand.I have not yet purchased this product from Amazon (they must have just started selling it) but I have purchased it many times directly from Griot's Garage. I also purchase the 1 gallon refill size and ensure that I am never out of it. I really mean that - I have to have this on hand in the garage because I use it on an almost daily basis! Here's why:1. BUGS: For most of the year we have little (and sometimes not so little) flying insects that seem to be happy to sacrifice their lives in order to make the front of my cars a filthy mess. These tiny winged terrorists aim themselves at the front of my highway-speed vehicle and splatter themselves all over it. Yuck.2. POLLEN: Ah, spring... when love - but mostly pollen is in the air. This yellowish/greenish dust covers your car every day. One of our cars is black... and really shows up bad.3. LIGHT RAIN: Don't you hate it when you car looks pretty good, only a couple of days since you washed it - and then there is a light drizzle or a passing thundershower - and suddenly your car looks like it hasn't been washed in months! The light rain gets the car just wet enough to puddle up all that dust that was invisible into ugly dirt clumps, but doesn't rinse them away.4. BIRD POOP: Yeah. This is the worst. I don't know what some of these birds are eating... but what they leave behind on the hood, roof, and fenders of my cars is like a nuclear biohazard. The truth is, that bird droppings will etch the paint and even eat right through it if you don't remove it timely enough. And when it has "hardened" it can scratch the finish as you try to clean it off.For all these problems and more - enter GRIOT'S SPRAY-ON CAR WASH KIT to save the day. I keep this in arm's reach of both cars in the garage, and when I travel I take a small 8oz. bottle with me!HOW TO USE: The best way to use Spray-On Car Wash is just the way it comes in this kit. The finest sprayer does a very nice job of putting the product where you need it, and easily regulates the volume applied. For this wash, I recommend a mist application, but a liberal amount applied. This will coat the area to be cleaned well and minimize it running down the surface too quickly. If you are accustomed to babying your cars, then you know that it is a mortal sin to ever rub a dry dirty surface! Using the green terry towels (part of this kit) wipe the area that you've saturated, in a one-direction scooping type motion. What you want to achieve is lifting the dirt from the finish without dragging it across. It may take several wipes in a very dirty area to get it clean. Then, using a dry clean part of the towel (or another clean towel at hand) lightly buff the area you just cleaned. Don't put any weight or elbow into it... just let the towel buff it lightly. Now feel that - and look at the shine... AMAZING!I started with this kit years ago, and continue to reorder as needed to keep all the components on hand. The Finest Sprayer does a nice job of regulating the application of the product and is very easy and ergonomic to use. The towels that Griot's provides for his products are really good. These towels are so much thicker and softer than any microfiber towels I've ever found elsewhere. They last a very long time too, if you keep them washed after use.Even if your car gets dirty a lot - this 32 oz. size will last you awhile. I use mine very liberally and I can go months on a full 32 oz. bottle. I recommend this product very highly!! I have been using it for years, and I will continue to use it for many years to come!