I have one.
using it for
- sketching things (really beautifully working pressure sensitivity in mypaint)
- as calendar
- alarm clock
- kitchen radio
- bathroom entertainment
- ebook reader
- navigation when biking
- reference picture display when drawing
- irc client
it is a beautiful little magic box for me but I still wouldn't recommend it in this day and age.
- quite slow switching between apps once it's been running for a while
- when phonecall coming in the first thing the phone does is to lockup for several seconds, THEN actually rings
- when picking up it lags again ("hello?...HELLO? can you hear me? I don't think this is wo- .. ah hi" - moment, every time)
-keys are actually cramp inducing if you're trying to type like a madman on it
I bet I forgot some stuff.
the thing is, it's a device from 2009/2010 and nokia stopped caring about it LITERALLY MONTHS after release and it shows.
now it's not even just a little buggy, it's buggy AND old.
I still love it but again, almost unusable if you're looking for a reliable "smartphone" compared to modern standards.