Just to say that this arrived a couple of weeks ago, and I have been using it daily since, and it has proven to be great so far. A nice little touch is that the ribbing on the backplate is rubberised and soft to reduce vibration etc.

It holds the N900 quickly and securely without fuss, and it's easy to remove the N900. Although when fully clicked in, the keyboard cannot be opened, it is possible to "half" insert the N900 so the top clip clips behind the screen and allows the screen to slide up. I tend not to type when driving so it's not a big deal for me.

Only concern is that the power switch is inaccessible, and there is not a lot of room for a audio plug into the headphone jack. Not an issue for me as I has a Bluetooth A2DP Car Stereo, but it would be easy to trim the plastic a little to make room.