People act like the iPhone is super unreliable in terms of email. I have NEVER missed an email on the iPhone either.
It's not super unreliably, just annoying and doesn't get me what I need.
What I (and many others) want in a mobile inbox is to almost instantaneously recieve our new emails, directly to our mobile device. Apple's Push has taken forever to release, and in that time people have bought blackberries. It works flawlessly with any email address I throw at it. And delivers push on all of them.
Also, I don't want to download the mail that already exists in my inbox. I could use the mobile browser for that. All I want is my new mail, something I'm waiting for, or something I immediately need to respond to.