You probably wouldn't want to use it to clean the whole car, that is for a waterless wash. However QD's are great for spot cleaning things like bird droppings, random smudgy finger prints, etc. I also use them for a post-wash wipe down to remove random water spots from the wash. Funny part is with many waterless washes these days you can mix them a little thinner and they pull double duty as a QD spray too. Often at a more economical cost. It's the main reason ECH2O is my QD spray these days.
I would like to try out the Ceramic Speed Shine simply to see what it's like. I've got a few other Griots products in my garage and been happy with most of them. The regular Griots Speed Shine seems to be pretty popular at our Cars and Coffee events. You frequently see people using it to remove the bug splatters they picked up on the drive to the event.