It's very shiny, and picks up smudges quite easily. It's also incredibly thin, around 11mm. The screen works like a trackpad on a laptop, so you can only use your finger. When you make a call it switches off the touch sensitive screen, but there's a button on the side that allows you to dial numbers whilst talking (handy for phoning call centres).
Set it to the blue theme and it looks a lot like OSX, the default Prada theme is black and white, and although stylish gets boring quickly. There's also a fish and butterfly theme, where you can interact with an animated fish or butterfly by touching the screen.
Using the camera and video recorder is great fun, as the whole screen is taken up by the picture. You can save images to the SD card that comes with the phone, and then access them on your PC via a USB cable.
You can flick through listings similar to the iPhone, but it's a bit fiddly and doesn't have the rubber band effect. The MP3 player works well, but because of the lack of a headphone socket you need to use the adapter that's included in the box.
Apart from the touchscreen it doesn't have any other features that you can't find on other mobile phones, but it looks fantastic and is really fun to use.