The phone is great, but there are issues with transferring notes. If you do a lot of notes, be sure to go to the Apple forums and get the lowdown on how to successfully save them to your new phone.
My issue was notes, which I ended up having to re-do by hand.
And: the iBird 'favorites' are gone!
I guess 'favorites are something that are stored on your phone and do not come over when you get the new iPhone.