Question [Q] Kenu Airframe Compatibility with Google Bumper Case and Fiat Punto

Hello, I'm about to purchase a Kenu Airframe.

Could someone please confirm that it is compatible with a Nexus 5 with Google Bumper Case? (searching on the forums, I could only confirm that it works with the Spiegel case)

Also, I'd like to know if the Kenu Airframe works well within a Fiat Punto 2005 model, but I'm guessing that info is way too specific.

Thanks in advance!