Wow you are getting three! That's great, you are going to love them. If you notice that the light is getting too hot for them let us know and we can hook you up with one of our LED fixtures. I'm sure you saw it already on Instagram.
You could add some more sticks if you want so they have more room to move around. If you give them pathways they will use the whole cage. Love the look of the viv which you already know!
I agree about adding the sticks. Looks great in every other way. I use natural branches from the crepe myrtles in our yard. Small diameter branches pruned to fit from bottom to top will get a lot of use. Ours would hang toward the top half the time.