I understand that some folks are disappointed with the 5C, and it just might not be the right phone for them. On the others hand, I think a lot of people are going to really enjoy this phone. It is basically the iphone 5 with a better front facing camera, larger battery, and more color choices. The plastic is fine with me, since most people put their phones in plastic cases anyway.
I know people are disappointed about the price, but we have four iPhones in my household, so on a two year upgrade cycle the 5c is about $200 per year less expensive than replacing the higher end model. I am pretty sure nobody in the house is going to suffer from lack of spec and features, and they will enjoy picking out colors.