I bought my GorillaPod a couple of months ago when I was preparing for a road trip. Although I have another traditional mini-tripod, I had seen the GorillaPod in use and was impressed with its light weight, flexibility, and speed of set-up.
The easy set-up is facilitated by the attachment of a mounting plate to the bottom of your camera. The mounting plate slides into a bracket on the GorillaPod and locks firmly.
The flexibility is physical and functional. The legs can be shaped to almost any shape (within reason and the limits of physics and plastic). This provides functional flexibility because the GorillaPod can grasp or hook to things (such as railings, handles, cyclone fences, etc.) and it can easily stand on uneven or non-level surfaces (such as rocks or the hood of the car). The GorillaPod makes it easy to take a picture of yourself using the camera's self-timer.
My GorillaPod is about 6 inches long when straightened out. It weighs about 2 ounces. It easily stows in a purse or other bag.
After quite a bit of use on my trip, I am still very happy with the GorillaPod. I use it with a lightweight point and shoot Cannon (SD500). This is not designed for use with heavy SLR cameras, but there are other models in the Joby GorillaPod line which will accommodate larger cameras.
I am very happy with my GorillaPod.