Presently, I love the idea of Chameleon, however it's functionality is quite trivial right now. I guess if all you do with your tablet is read news/social media/emails, then you'll like this $10 app, but for me, I could care less about news feeds and social media and weather. I use my Nexus 7 in the car exclusively, for navigation, listening to audio/audiobooks, etc., car stuff and this app just doesn't have any features that appeal to my uses.
I think with usual price of apps being around $5 or less, people are shocked at the $10 price tag, but when you think about it, it's really not that bad. Presently I don't think the app is worth the price, but as they add more widgets, I can see it evening out. An interesting feature for using this app would be if they charged per widget, this way you get the functionality of the design, but you don't need to pay for facebook and twitter apps if you don't use them, etc.