I bought the rubber case for my 7130C and have some observations...

PLUSES:
-It's well built, fits nice, and doesn't sag around the edges as some other covers do.

NEGATIVES:
-Very difficult to get it out of your pocket as the rubber sticks to clothing.
-Harder to type as the case makes using the extreme left or right keys difficult.
-Hard to use the thumb wheel as it's a bit more receased.
-On/off button and mute covered up (but still seem to be usable).
-Attracts lint. Not a real biggie as a lil' bit of water cleans it up.

FINAL: Not for me. Rather pricey, IMO, for what you get. Can't get it out my pocket without bringing everything else with it. Keys, change included. Seems ideal for those in the field...ie. Mechanic, telephone repair man/woman.