Okay, mine's been sitting outside my front door for one or two days.
I'm not quite getting the need for the Bump...
It's firm like the Field Case, ever so slightly larger feeling overall -- millimeters, I'd say -- but feels the same generally in hand. Pressing down on the inside of the empty case, I do not feel anything particularly "cushiony" like you get with a CandyShell. (You also won't get the scratches the CS so easily accumulates.)
There is a tiny bit of droop just below the home button, the same as my FC. The buttons might have a scosche more positive feeling to them (volume buttons are improved), the slightly deeper mute button hole speaks to a bit more thickness, and I'd say there's more "lay on the table" screen protection.
I do see more metal around the edge on the right side of the screen... just a sliver, though. That might change over time.
One inconsequential thing is it's quite difficult to get the case out of the inner plastic form that holds it in the box, fwiw.
I don't use glass screen protectors, but the Bump might be friendlier for those if it was a problem with the Field Case.
I'll give the Bump Case a few days to see what other impressions develop. The photos above depict the colors/seize/etc. correctly, imo.