Traded my Treo 600 for this phone due to lack of reliability of the Treo. We have replaced four Treos in less than a year due to the failure of the speaker. Want to have more than PCS service for travel so this is great --- voicedial and more speedials than the Treo 600 also make it great, besides the small form factor of this phone. Like that I have 7 hours of talk time with two batteries that this comes with. Great construction, not flimsy and great 65,000 color resolution vs the Treo's poor display. 16mb of memory is more than one needs and it holds my 2500+ contactss, etc. with no more than 2MB memory. SMS is limited to receiving but I found a free piece of software that allows me to SMS. SnapperMail and Vindigo with this make it a true traveller.Graffiti vs. Keyboard is fine as I have been a Palm user for many years. Also have an unlocked GSM TMobile prepaid service for a SonyEricsson 610 which lacks user friendly interface and has a cruddy joystick.Both the Treo and Samsung are about the same price. The only issue is that it is harder to get aftermarket add-ons for the i500 vs the Treo, but they are available. Had to hunt for an extra charger, sync cord and data software but Sprint Vision makes the phone rock for looking up things on the go.If you are concerned with size, reliability and tri-band, go to Samsung vs. Treo. The speakerphone in Treo is tinny and the camera is useless, so go for Samsung.