I recently replaced my BlackBerry with an Apple IPhone 4s. I also have had an IPad 2 for some months.
What surprised me was how underwhelmed the IPhone left me. Yes, it's cool and way beyond the BBerry, but it just hasn't grabbed me the way the IPad does. I'm not sure why.
One thing the Apple folks need to do is to make it possible to delete all incoming emails all at once from either device. The way it is now, you have to choose each e, after which you then delete them all at once.
Trash works well - you can choose a group delete. Done! Since I receive emails - identical emails - on My Windows i7 computer, the IPad and IPhone, I have seen them by the time I get to the second device.
The IPhone camera is much better than the IPad one. When they release the next IPad device, if it has a better display resolution AND better camera, I will sell mine and move up. As far as I can tell, those two features will be addressed.
I bought an add-on device which will make either Pad or Phone a replacement for three of my remotes. It's called an L5. It's a tiny IR emitter. Setup isn't that much fun, but the result will be cool. I won't try to mirror the TiVo remote because I really work it, turning volume up or down many times in most shows or commercial breaks - or skip through them. Don't get me started on TV audio!
I just finished reading the Steve Jobs book on the IPad, which was somehow odd and appropriate.