I have the mCover by iPearl. It stands apart from the other covers since it has retractable pegs that can prop up the laptop for better heat dissapation and ergonomics.
I posted a video demonstration of it on YouTube.
http://www.youtube.com/watch?v=kj_K6dVW6d4
I highly highly highly recommend the Moshi iGlaze shell. I have the clear version on my 13" Air and it is a smooth, good looking case. It fits so well. It's like when Homer kept hearing Flanders say "It feels like nothing at all... nothing at all... nothing at all."
http://store.apple.com/us/product/H9020ZM/A?fnode=50&p=1
I have the mCover by iPearl. It stands apart from the other covers since it has retractable pegs that can prop up the laptop for better heat dissapation and ergonomics.
I posted a video demonstration of it on YouTube.
http://www.youtube.com/watch?v=kj_K6dVW6d4
I dislike the mpearl. The hinges are sloppy, and the feet are adhered with glue and came off quickly. Also, the case likes to seperate from the MBA easily.
I've been using the mPearl for about six months. I haven't had any problems at all and recommend it. I don't use the feet, so I can't comment on those.