Pros:
This is their 4th crowdfunded project, after 3 successful other similar projects, so you know they will be able to deliver.
As mentioned on their website, no one wants to run out of battery juice when they're taking pictures of their cat for the internet.
All the obvious pros of being able to charge a power source "for free" (while you're already doing something else that you were going to do anyway)
Cons:
It still looks like a big old solar panel. It would be so much better if the design looked more stealth.