Hi everyone, I always (for some dumb reason) thought keyboard cases were unnecessary and useless. But I've noticed some people in my classes have them, so now I'm interested. Please help me decide if it's worth it and what models are the best. I have an iPad Air. I don't use it often, but it gets a lot of use when viewing PDF notes to study. I also have a retina MacBook Pro. It's great, but it would be nice to keep the computer and charger at my desk rather than bringing it with me everywhere when it's only really needed to take notes. What do you guys think of the cases?