I have used the Kit wash and wax for years, on a number of cars, including the Element now. I like to use it for keeping the cars nice between waxings and it does a good job on that. It does NOT REPLACE wax, IMHO. It DOES make a nice supplement to waxing and cleans well and is mild on the finish at the very least. It is EXTREMELY good for my both my daughter's cars that rarely get ANY wax otherwise.
I have always used it with Turtle or Meguars (sp?) wax or whatever I am trying at the time...generally going back to the Turtle.
I am going to try using the Eagle One wax-as-you-dry, but will probably try that in addition to washing as I alway have with the VERY affordable Kit. I might try the Eagle One car wash if the Kit is not a good combo, AND I end up liking the Eagle One finish.