Looks great!
Was the apple cider better than beer or wine?
My apologies to the OP for "butting in"....
Apple Cider vinegar - or any vinegar - is very acidic and might be something fun to try adding to this type of marinade.. In some marinades, it can add a nice "bite" to the flavors - but balance is always the question as for how much to use, and for how long to marinate.
But - perhaps the chemistry of it is often overlooked. It breaks down proteins. Not enzymatically like papain or pineapple juice, but it can "de-nature" the proteins without changing their physical form.
T