I have had a Treo 650 for about two years now.  I am a cell phone junkie and like to have the newest technology but I love this phone so much I won't even think of getting something else.  I won't even "upgrade" to a newer Treo.  As a matter of fact the one I have in use now is my second.  I bought the first one used on the internet to test it out and the second new.  It reboots from time to time but only if I have the text message notification and try to delete messages with out clearing the notifications.  Not a big deal at all.