Two-shelf Bookcase

LOML re-organized the house and I’m giving up a bookcase I’d built some time ago.
The replacement is a Black Cherry & Curly Maple 4’ wide 2-shelf unit.
I designed it with a finished look on the back.

The sides are frame & panel with a bookmatched cherry floating panel.
Not your typical bookmatch, the outside left of the case matches the outside right.
The back is frame & panel with a mid-stile; the rear panels are ship-lapped black cherry.
The frame & panels are full mortise & tenon construction.
The back panel has a 1/4” stub-tenon the full length of each stile fitting
into a 1/4” stopped dado on each side panel.
The bottom shelf is connected using a stub mortise & tenon.
The case top connects using a shallow dado which sits down on the back and sides.
The middle shelf sits on shelf pins.

The photos are terrible but they’ll give you some idea what I’ve done:

All comments, criticism and questions welcome.