Overplay or great play?

[tongni]

Party Poker 20/40 Hold'em (8 handed) internettexasholdem.com

Preflop: Hero is SB with 6[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/spade.gif[/img].
UTG calls, UTG+1 calls, <font color="#666666">2 folds</font>, CO calls, Button calls, Hero completes, BB checks.

Flop: (6 SB) K[img]/images/graemlins/spade.gif[/img], 6[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(6 players)</font>
Hero checks, BB checks, UTG checks, <font color="#CC3333">UTG+1 bets</font>, <font color="#CC3333">CO raises</font>, Button folds, Hero calls, BB folds, UTG folds, <font color="#CC3333">UTG+1 3-bets</font>, CO calls, <font color="#CC3333">Hero caps</font>, UTG+1 calls, CO calls.

Turn: (9 BB) 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">UTG+1 bets</font>, <font color="#CC3333">CO raises</font>, <font color="#CC3333">Hero 3-bets</font>,