semi bluff flush draw with pressure

[THATWACOKID]

This is my second orbit at the table. I have around 250 hands on villian.. stats are - 18/7 wtSD 15 w$SD 63

Party Poker No-Limit Hold'em, $ BB (10 handed) converter

SB ($416.3)
BB ($509.1)
UTG ($477.5)
UTG+1 ($418.5)
Hero ($388)
MP1 ($669)
MP2 ($880.15)
MP3 ($1008.2)
CO ($200)
Button ($282.7)

Preflop: Hero is UTG+2 with K[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/spade.gif[/img]. SB posts a blind of $2. MP3 posts a blind of $6. CO posts a blind of $4.
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to $16</font>, <font color="#666666">2 folds</font>, MP3 (poster) calls $12, CO (poster) calls $12, <font color="#666666">3 folds</font>.

Flop: ($56) 9[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">MP3 bets $35</font>, CO folds, <font color="#CC3333">Hero raises to $150</font>, MP3 calls $955.20 (All-In), Hero calls $222 (All-In).

Turn: ($1418.20) Q[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players, 2 all-in)</font>

River: ($1418.20) K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players, 2 all-in)</font>

Final Pot: $1418.20

Thoughts on the size of my raise? Is this call +or- ev?