I came to Symbian S60 v.5 and Symbian Anna from Sony Ericsson (UIQ3), and I have found some shortcomings on the Nokia OS. F.i. if I need to open a contact from the call log or sms - I can't see a way to do that with Nokia OS. With UIQ3 this was very easy. In stead I will have to open the contact list and find the contact there. There are still some of us who use the device as a phone, and not an mp3-player or internet browser.