I've got an iPad 2, along with a windows 7 tablet, also have a desktop. I love my iPad, I'll not give it up for anything. When I'm sitting on the sofa reading, it's ideal. It doesn't get hot, it's not too heavy, it's just perfect.
By comparison the windows 7 tablet is slow, clunky and a pain to use. But on the other hand when used like a laptop it's not s bad. I generally use it if I'm out and about troubleshooting. It's also where I do the bulk of my writing.
There are things that the iPad is not good at. For instance, relying here in the forums, your missing all the editing options. Also when using the keyboard, it takes up half the screen. But what it comes down to in the end is I love my iPad.