Love the Poetic
I just received the Poetic Slimline for my iPad Air so I can't speak for longevity.
However, my initial impressions are a super case for the price. I purchased the white Poetic and it matches my white iPad perfectly. The back is definitely very slim and all the cutouts are spot on. The cover works with the sleep/awake function perfectly and works pretty good in the fold up triangle position.
I know that this won't give a ton of protection but I really love the slimness of this case. So many others get too bulky.
Also, poetic gives a 3 year warrantee against manufacturers defects.
I actually ordered another one in red. Can't beat the price on Amazon.