It's awful.It's too big. I used to own a Palm Vx and the official Palm case, so I know that it's possible to make a case that's not absurdly large. This thing makes the Tungsten E about a centimetre wider, and twice as thick.
It's too heavy. It makes the palm weigh about half as much again. Given that the main strength of the palm is how handy it is, this pretty much defeats the object of owning the palm.
It rattles. This case is so big that the palm doesn't even fit snugly in it. The thing rattles as you walk.
It's badly designed. The case blocks access to the usb port, the power port, the headphone jack, the IR port and the power button. Hence, it is difficult to charge and sync, difficult to switch on, and you can forget about using it as an mp3 player in your pocket.
My view of this case is that it's not of any use to anyone. The silly leather flap that the Palm comes with is ten times more useful.