What do you think of the iphone 4

I would really like to hear more about your favourite features on the iphone! and even your favourite applications. I think the apps are great and the quality and ease of the technology is amazing! I am saving for a bond and almost have enough money to start applying for houses and that's what i really need! But i must admit the ipohne and ipad are tempting me into wanting so much more out of my handheld technology devices. I would love to hear about all the pro's and con's you have found with the iphone. Or anyone else who is reading this? Please share your experiences i don't know much about the models launched by other brands in the iphones competition and would like to hear about them too if anyone can help me out?