iOS 5 user here: What is the state of maps in the new release?
[Luddite attitude, but it's the #1 reason for my phone, more than text/mail of any variety.]
It's better than the one that was native to iOS 5.
I'd be curious as to the details: How so exactly? (I see friends copying and pasting to google maps from mail/txt app? which leaves me nonplussed.)
http://www.pcmag.com/article2/0,2817,2416321,00.asp
So long story short it is likely you will have a few map apps on your phone.