[Poker Gods]

Semi bluffing is something a lot of players do when they move over from Limit to No limit and is often overdone I think. It really depends on who your opponent is, basically you don't want him to call and you defintely don't want him to raise, if he does call then you want him to be either timid on the turn if he has a reasonable hand or else the type who will call a large bet if you do hit, overall though I think it is mostly though not always a costly play for you. Why not just flat call and if you get your hand who knows your opponent may not believe your big bet on turn.

What it boils down to is who is your opponent and his/her likely actions.