I just had my first Treo 700WX replaced as the ON-OFF key would not power on the unit without several tries. The new unit became pretty sluggish after loading Google Maps. I also had it loaded on the old unit but it wasn't sluggish to write to the screen. I realized when loading the application that I had installed it to the main Memory instead of Storage card. I removed the application and installed again to the Storage Card and now everything running perky.