That looks very similar to the glossy bumper case that Verizon sells only a lot cheaper (19.95 or 16.00 with my job discount). I have that one and love it. It adds just enough grip surface to the edges of the phone while providing some cushioning if it falls. For $6.95, I say go for it.
If you take anything away from the Forum, take this: Don't buy accessories from the service provider. It's like buying tires from a car dealership. They only have a few options to choose from, and you'll pay twice what you would in the open market.
For instance, Verizon stores have an 'accessory package' that they will include with phones 'at a special price.' Basically, its an extra charger (which most won't need), a case, a cheap-o headset, a screen protector, and a belt clip (which doesn't work with the case). They charge $95 for that (which they claims saves you $40).
Here's the breakdown of what you can buy these items for on the secondary market:
Car Charger (better than an extra wall charger, IMO): $8
Case w/ Belt Clip: $30 (for similar quality as VZW offering)
Screen Protector: $12 (set of 2)
Headset: $10
That's $60...saving you $35 over VZW's 'special priced' package (and I was leaning toward the high end with some of those prices). And, it'd be an even better savings if you just went with the case I linked before.