I installed it, set it up, and after 2 days, uninstalled it. Had read great things about it, but I don't find it that intuitive. I'm using the stock email app for my Yahoo (and it pushes, without a Plus acct, so there you go) and downloaded a GMail app for my other email accounts. For now, this set-up works out okay for me.
I may next try MailDroid (free) and upgrade to Pro if it's good (though it's $17.99!!)
Thanks everyone. I downloaded K9 and like it sooo much better than the stock app. The account settings offer a lot of customizing. Have a question though...how do I make the sent, outbox, trash and draft folders show in the folder section? All I see is the inbox folder in folders.