I guess $10 is a small price to pay to protect your 8300/curve. Its a pretty cheap plastic casing, but it is definately perfectly fit for the curve. I got it in black and I can already tell the color will probably scratch off 6 months down the line.
This gets 3 out of 5 stars from me, but that doesnt mean I regret buying it. I will mostly likely keep it for a while just because it protects my blackberry pretty well when i throw it in my bag from a distance. Also I can still put this thing in my pocket without losing too much thinness of the curve.