I have a Treo 650. I just bought a new laptop that came with Vista 64bit. Little did I know that NO PalmOne product is compatible with Vista 64bit and they (by the words of one of their customer reps today)are not working on a fix. Now I'm going to have to buy a new phone if I want to be able to sync. More and more new systems are shipping with Vista 64bit and many people are caught unaware of this fact. Please know if you buy this phone, it will not work with Vista 64bit as of the date of this review.