Please appraise this hand from both perspectives
2-4 6 Max, 20 minutes into a session. No strong views on tendencies available
Button raises to 14 with
, playing 440
SB calls
BB flat calls with
, playing 480
42 in pot
flop
blinds check
Button bets 36
SB folds
BB calls 36
turn
BB checks
Button bets 80
BB calls
River
BB checks
Button pushes all in
BB calls having housed up, and scoops
what do you think of the BB check on flop with middle set?
what do you think of button push on river?
how would you play it differently as either player?