I have a Serene. I think it's a great mobile phone, and great for texting once you get the hang of the circular layout and avoid touching the wheel by accident (which repositions the cursor).
The text memory is not too good, but then I am not good at deleting texts received. Photographs are better than the pixel count suggests, but you do need to use the camera as a waist level portrait format camera.......... and no one will realise you are taking their photograph!
Disadvantages? It's useless when it comes to web browsing. If not held carefully you can find the motor trying to close the phone as you get it to your ear. If I'm honest the iPhone beats it in just about every area other than 'being different'!
Graham
I used to be indecisive, now I'm not so sure. [W C Fields]