King's Gambit Accepted Question...

I've seen this a couple of times, and it seems to mount a fairly heavy attack. Help?

heavy attack for who? after 4.exd5 Nf6 (Qxd5 seems a waste of tempo after Nc3) 5.Bb5+ white is doing fine nad gets either his material back after 5...c6 or gains some initiative by saccing the d-pawn and just castling. The f-pawn in this case will be gained back after some moves ,and in the end You will have a center majority to gain a comfortable middlegame. This really shouldn't provide much trouble. On the other hand,  an objective advantage is also not really there, but than again, you are playing the king's gambit so i guess you would know that.

Fair enough... Thank you!