I have used gmail for at least a year, back when it was by invitation only, and I've loved it always. I've used it via POP, with Outlook to start with, and then with The Bat! for the past six or seven months. However, I have spent the past month living in my browser (so to speak), relying only on gmail's web access for my email (and RememberTheMilk for my to-dos, and 30boxes for my calendar). While I will definitely continue with RTM and 30b, I am going back to The Bat! for email. As much as I like the gmail interface for on-the-go emailing while travelling, etc., I find that for me having an email client is necessary. But I love the fact that gmail keeps all my mail, so it's so easy to access things when I'm using some other computer. I find this combination to be my best working solution...