Incredimail is literally what it is named; incredible.
For starters, Incredimail is an email client only; that means you need to have an ISP for Internet access. So if you use AOL, MSN, etc., you can still use Incredimail, but you’ll have to maintain your ISP connectivity (and payments most likely.)
One of the best features of Incredimail is its unified inbox and ability to access POP3, IMAP, and Web-based email programs. I had 2 POP3 accounts, one IMAP account, and 3 Web-based email accounts (2 Hotmail and 1 Yahoo)all being checked and downloaded into a central inbox. In a column to the right of the messages in the inbox you’ll be able to see what account the email message came from.
I didn’t have much use for the stationary, although being able to change the appearance with the use of skins and changing the message notification was kind of cool though. That requires the Pro version, which you have to pay for.