| Like jimbob said, the reservoir has a window no matter what color you get, just like the Cozmo. I chose clear solely based on cosmetic preference. My friend has one that's clear and it looks very cool, and it will go with anything. I'm really excited, which is silly, cause I have a great pump already, but I am. I anticipate that the paradigm will be more comfortable to wear, so that will be interesting to see. I'm not too worried about heat or light, as I'm getting the 522, so I'll be changing the reservoir more often than I do now, and I don't have problems now. | 
