Had iPad2 now for 6 months and find it invaluable.
Lots of positives - too many to mention
Couple of areas for improvement - definition of text in handwriting Apps, keyboard a bit of a faff, and far too much dross in the App Store.
However, I love it and will probably get another for the house (iPad3 when its released) so the kids can leave mine alone. Of course mine will be the upgrade!