There is nothing wrong with it. I used it for a long time before I found Autopia and I still keep a bottle or two of it around. The only gripe I have with it is that it will stain black plastic and rubber trim white and it can be difficult to remove if you like to apply to the whole car and then go back and start wiping. If you are careful not to get it on your trim and you apply and remove one section at a time you can't go wrong with it.
Here is a picture of my GT with Zymol Cleaner wax on it.