I'll give it points for the arrow keys. There just really isn't much in the way of good positions for arrow keys on a split layout. That said I don't like what it's doing with the thumbs. Thumbs want to move radially more than in and out.
I have my Ergodox set up so I hold down a thumb key and it activates a layer so my right hand has arrow keys and pgup/pgdown/home/end right there on the home row.
I can't live without it now.
My keyboard is set up in a similar manner but it adds a point of complexity. Ctrl-Shift-Arrow is harder to use since the Fn key is trying to take up a thumb.
I still prefer that complexity to having to move my entire hand from the home row to use the arrow keys. I'm very used to it now.