Had one on my 4S and it was a very nice case. That said, they've redesigned it for the iPhone 5, you no longer screw the case together but rather apply a plastic liner/bumper first and the aluminium bit then clips on over the top of that. Should make getting the case off easier if you ever need to.
Not sure if it looks as nice both front and back, and I kind of liked the screws. Am interested to hear how the redesign goes with reception...I had no major issues on my 4S but some people seemed to lose a bar or two if they used the aluminium shell front and back (as opposed to the optional hard plastic back version).