I tried it and it was just OK for me. First, my battery drained pretty fast. Less than 1/2 day, actually. It took a while for the email to push to my iphone, and calendar and contacts didn't seem to update easily or accurately. All-in-all I didn't feel it was so stable.

I know this is still a beta. I hope that when it is released it will work as efficiently as WM phones.

For me, I love the iPhone, but exchange service is a must for me and is the reason I end up using my Treo on a daily basis. I really hope that I am not disappointed as I am really looking forward to version 2.0