SSL, rate this play for me

[KitCloudkicker]

"....A player ahead of me with Ace-King raised it and by the time it rounded to me, four players were in. I realized I had Eight-Seven suited, a hand with lots of potential, and so I made it three bets. The flop came Ace-Six-Nine (all different suits), giving the original player his magic pair of Aces with a King kicker. It gave me an open ended straight draw with little chance of a flush. He bet, everyone folded to me. I raised, and he raised again, when I finally called. The fourth card came a Ten, and he bet, I smooth called, hiding my straight. Although there was a flush draw on the board, it was unlikely he was holding the Ace-King of the flush, and so I confidently slow-played my made straight.

The river came a Two (not of the flush suit) and I was golden. He bet, I raised, and he became puzzled. He knew the Two didn't help me, but he couldn't put me on a hand that would have resulted in all that aggression so early except a set. Nevertheless he called my raise and threw his Ace-King down in disgust. I dragged the $247.50 pot (minus the casino's $4 rake and a $2.50 tip for the dealer) and spent the next ten minutes stacking my (his) chips."