[cd34]

I use IMAP because I can access email from multiple machines or devices. Its a bit quicker when you deal with a lot of mail because it only downloads the headers until you are ready to view the messages (depending on your email software)

The only real detriment to it is when you are sending large attachments -- for some dumb reason, imap sends the original message to the person, then, has to send the attachment & message up to your sent-mail folder.