iPhone 5c build quality?

I've heard varying comments on the 5c's build quality, and I'd have to say I'm confused. My 5c feels very nice, but it feels very creaky. I can apply pressure to the back and front of the phone and it'll make a very audible creak. If I pick it up just right it creaks. It's just so creaky! Anybody else having a similar issue? Anybody else's feel really sturdy? Is this worth taking to the Apple Store?