I got my Treo 650 back in November of 2004 and it had the typical build quality problems, namely:

1. Battery case "sqweaks" on one side when you press buttons.
2. Some keys (p and spacebar plus a few others) don't click.

I had the phone replaced 4 times, all had the problems to varying degrees. What I cam curious about is now, 6 months later, if the Sprint Treo 650's are any better?