This makes me lean more towards pad and quill. I love the idea of being able to take the phone case part out of the book book when I don't want to use it as a wallet, but I love the quality of pad and quill...
I've really liked my Dreem Fibbonacci, though I wonder how it will hold up longer term, since it is "Vegan Leather." I love that I can pull the phone out of the wallet, in its own case, and put it in my car mount or use it separately.
While I'd love a quality leather case, I have a hard time justifying it since I like my current case. I think, if I end up doing it, I'd likely get either the Burkley or Ullu case.
Something I'd love to see is the makers of these wallet cases, with the removable phone case, is where you could keep the wallet portion of the old case and just use a new phone case. Part of what I like about the leather is the beautiful patina that develops. Also, with the removable phone case, I don't need the camera cut out in the wallet, making it easier to just do an "upgrade" of the phone case.