The Smart Keyboard Folio is great! I got one on clearance a few months ago and use it whenever I'm using the iPad around house/town. (If I'm travelling out of town with my iPad where I won't be able to use my desktop keyboard, I bring my Magic Keyboard instead.)

It's so good that if Apple changes the form-factor of the iPad Air, I'll probably take that opportunity to buy the last Smart Keyboard Folio-compatible iPad Air to stretch my use of it as long as possible. (Though I worry that at that point I'll wear out the internal ribbon connectors eventually.)