QJs

[Ray Of Light]

In a smaller pot, I would probably take the free card on the flop.

BUT, because this pot is big, you have a back door flush, back door straight, and two overcards to the seven on the board that may still be good; the pot is large enough to put in a bet on the flop. You might scare off some better hands, and whittle down the field, giving your hand a better chance of winning this large pot.

I would check the turn unimproved, but as you improved, the turn bet is standard IMO.

The river, without a read, is standard too IMO.