I purchased a case, the El Diablo from NewEgg.
It shipped with what I believe was a manufacture defect.

The fan blade on the large 36mm fan had what looked like a flaw in the plastic the fan was made out of.
Lke there was an interuption in the molding process when the fan was made.
After a thud or two by the shippers it separated from the hub.

I e-mail ABS not really expecting anything. Just asked for a link to where I could purchase a replacement fan because
I didn't want to play the RMA game.

I got a reply from a very helpful person named Abbie at ABS.
She apologized for the inconvenience and wanted to make things right.

I sent her the paperwork she asked for and now there is a peplacement in the mail at no extra cost to me.

That's pretty damn good service if you ask me.
Especially since I was willing to buy a replacement.