I got the (old) Treo 650 (or sinilar) from my father as he bought a new one back when I was a teenager. I was the only one with a handheld at school (I was maybe 13/14 years old), and I had a funny discussion with teachers about task management on a handheld (they obviously were overwhelmed by a teenager consisting tasks belong in a handheld, not a physical notebook).

I think it still was one of the best handhelds ever produced.