Hello. I have had the Sword 5 bumper on my black iPhone 5 for a few weeks since a trip overseas. It replaced a Draco V (metro black) which replaced an Element 5.
The Element 5 looked great in the photos, ugly on the phone. Reception dramatically decreased.
The Draco V looks fantastic on the phone, but is uncomfortable to hold. Some reception loss was noticed but not as bad as the Element case.
The Sword 5 bumper (silver) looks nice but I have also noticed reception issues. Again, not as bad as the Element V. Without the bumper -86 and with the bumper, -92 (not dramatic but noticeable.) It is comfortable to hold but the rim looks fat (imo).
I have ordered the Power Support Flat bumper which I expect to be delivered tomorrow. It is not aluminum but it looks nice.
Edit: Also, the logo on the side of the Sword 5 is far too large.
The Element 5 you are talking about, is it an authentic, costly one? Also, is it the "Sector 5" with the 4 polymer links at the corners? I find it hard to believe you had reception issues with that. That one is the only one I had no reception issues with. I know knock off companies are selling their version of an Element Vapor 5 that has no polymer parts and fake Vapor Pros. neither of which Element manufactures and are not designed by them to specifically work with the iPhone 5.