I have never used an Ipad but I have some relatives and friends that love theirs. One has an external keyboard, the others save their tasks that need typing for later when they have access to a real computer. I gave a silicone back to offer some padding to one of them at christmas, if I bought an Ipad I would buy that same cover for myself. I bought it from a ebay vendor in China.
I have carried a 10 inch netbook (Lenovo S10) and it came in quite handy when I had wi fi to check out where to stay for the next several days, make phone calls using Google Chat, etc. Netbook is hiding in the background in this photo.
I do not have a smart phone, my phone is so old it does not even have a camera. Also, it has terrible coverage in rural areas where I want to tour. I would rather avoid the dataplan fees, thus I just use wi fi when available.