[Big_Jim]

PFR may not have expected 3 people to call, and is less likely to continuation bet with air.

Board is ridiculously draw heavy, and lots of hands can call you.

You know it and I know it, this is not the spot to go for the check/raise on the flop.

Since you did, you should push the turn.

Edit: Oh yeah, and call river. Lotsa two pair hands could be out there, and not too many guys would semi-bluff with a flush draw after checking the flop.