I find the very shallow depth of The Galaxy S2 and being made of shiny plastic contributes to a less than satisfactory grip. Not being that keen on gel covers, I opted for this flip case instead. I am pleased with my choice.
In use, it has little impact on the length and breadth of the phone, which I like, and adds just enough to its depth to help holding the phone more securely, especially in camera mode, when it is flipped open. What few buttons there are on the phone remain visible and usable at all times.
My phones do not get abused so I would anticipate a long useful life from this case.
It is a pity that no protection is afforded the lens for the camera and which consequently is always exposed to the risk of scratching or other physical damage. For this reason, I have docked one star. But otherwise the case works as it should.