Does anybody think PDA's are useful? If so which one do you think is best?

My brother got a asus mypal thingie and he's just using it for car navigation.. i think you could use it for a lot more things.. i think i gonna buy one next year

Its really if you think its useful, it depends wat ya wanna use it for

Mainly as a handy phone book n to store pictures. I seen some that lets you choose to have a cam installed in it or is already part of it. Dunno but I like them. They might be useful for other things.

I got one for car navigation - it's perfect for that. I also use it as a diary, it keeps track of my appointments etc. I quite love mine.
It's a Palm Tungsten T3 - but I don't know if others are not as good, or better - this one came with navigation in a pretty good deal, so we got this one.