Nice set up, I can seccond the comment on an additional plant... I have an umbrella tree in my cage and my Cham loves it and it fills the space well. I would allso recomend setting up a drip system. There is no need to spray if you have one unless the Chem is sheding and even then its not that big of a deal. If you dont feel like building one you can get a dripper at any pet store.
The only other thing I would add (and I am adding this today after doing lots of research online) is a UVA/UVB florecent tube light along the side on the outside of the cage. This makes sure that reguardless of where the Chem is he/she will get the proper UVA/UVB light that it needs. Since the one on the top onle has an effective fange of 12-20"