I have this case and LOVE it! So thin and stylish. No issues with the reception!
Only issue I have had this now for 2 mnths and the back has lost chunks of the 'plastic' finish and leaves high gloss scratch marks that are a little annoying when holding the phone as you can feel them and they don't look great either!
I liked the regular feather case for the iPhone 4 so when I upgraded to the 5 and saw that there was a shiny version, I instantly picked one up. It's a great case and doesn't affect my reception, but the case is really slippery so it slides around in my car. But other than that, it's a great case!