In the two pictures shown as examples in this thread, no armrest or cup holders. If the skies fit on top of the armrest in the backseat, that puts the tips of the skies at about eye level of front seat passengers and bouncing around with no support.
My Lexus IS has this with cheap cup holders, storage and your skies lay flat onto the front arm rest. I personally would trade this for fold down seats even if they were less safe.