Hi, late response but I just got this case and I have a Smart Cover. Unfortunately it does not fit, as the smart cover leaves a noticeable gap when closed. keep in mind I do have a screen protector which may exasperate the issue as stated in the case’s description on the Pitaka website.
With that being said, my Magic Keyboard and Smart Keyboard cases both fit. I also imported a Black Rock magnetically attached kickstand from German Amazon and it works well.
I am going to buy an ESR folio like Psyclism has and I will be back with an update on if it fits or not.