What did you find deficient about it? What did you want it to do that it couldn't do?
You must not get a lot of emails. What's the point of email on a mobile device if I have to re-sort through my emails when I get to my desk? I don't want to have to keep track of who i've replied to and what messages I've already read and deleted. After IMAP, I really can't go back to POP. It's just a freaking mess really.... Our company uses gmail, and the IMAP implementation with the iPhone mail client has been pretty flawless (users don't even need IT to set this up...). Now the IMAP behavior with the Apple Mail OS X client...that's a different story....
All great discoveries are made by mistake. -- Young