Yes! You should it is so awesome! I have one. It isn't that expensive if you can find a good deal on it. So it depends for some people I guess. But it is very helpful. Very fast, Siri, light weighted. Plus, pretty colors! The iPhone 5c is so worth it's money!
It has so many less features than the iPhone 5s, not to mention it is a lot less durable (in a drop test on YouTube, the video showed that the 5c got destroyed from a waist-level drop, and the 5s was almost untouched from a 10ft drop). It's only $100 less than the 5s. In my opinion, it should be less expensive, since you're compromising on so many features.
I would not by the phone because I am happy with my iPhone 4S. I have not seen anything in the new phone that excites me enough to purchase it. Secondly, I do not like the size of the iPhone 5C. It is a little to large for my liking.
With the technology currently available, I believe there are other phones available that are much better than the iPhone 5C. With brand name being the important justification for purchasing a product, there are more options available that may work better for someone. The one major reason an iPhone 5C would be an option to buy is the price point.