If you live in Texas, like myself, it is very needed. If you live in Finland, like yourself, you probably don't need it. It deflects air up into the condenser and radiator helping the overall cooling. But just note, without it, all you have is those 2 tiny little holes in the front bumper to let air through the radiator and the Intercooler.
Oh wait.. On second thought.. if you want the intercooler to work more effectively, you should keep it on.