Re: My Z10
"...and the first thing the sales assistant said about it was that it was a difficult interface..."
The sales assistant isn't a freaking mind reader. They don't know whether you've had 10 billion years experience and can tell the difference between a 9320 and 9360 by smell or whether you're someone that has trouble finding the "call" button.
It *is* a big change going from the old OS to the new one and it is better for the assistant to assume a lack of knowledge and issue a warning than mindlessly flog a Z10, only to put up with a barrage of abuse and questions later.