To IPhone or not to IPhone

I found out that I will not get my UPS discount on my phone plan if I activate the IPhone. For me that would double my cell phone bill. Is it worth it? Seriously, I want to know. Tell me your your iPhone stories good and bad. Details people - I know you can get on the Internet, listen to music, watch videos, sync to outlook, send email - tell me something I don't know....