This shell is in two parts. A soft, black, on which is superimposed a brushed metal edges. This perimeter perfectly fits and does not risk falling because it is blocked by a suitable grooving. Mine is champagne color, identical in color and touch my iPhone 6+, also colored champagne. For me it is the most beautiful effect.
The metal buttons that come to the original ones, work well (do not press like crazy over it, as some shells).
For installation I would advise removing the metal rim to easily put the iPhone in the soft shell. Once done, put the metal edge in making sure that it is perfectly clipped into its rail.
The thin shell that seems sufficiently protect the iPhone. It does not alter the new form or the grip of the iPhone 6. If you want the iPhone to be more protected, we must then put a thicker shell, but that will change some design and grip iPhone. Especially for 6 more that is already big enough. For me this case is the good compromise. According to this last point is a personal judgment.