It's the only worthwhile option over the OEM PCV.
The best way of routing them is down in to the exhaust tunnel as far as where the main catalytic converter would be - either to the side or just inside the tunnel/heatshielding, which is what I did, along with suitable heatshield tape on the breather pipes. Since doing this I don't smell it at all. When they were simply routed down the 'back of the engine bay' the smell was vile and overpowering, came in through the vents, open windows etc.
And for Rich's question - the pipe from the cam cover gives no residue at all on mine, just gases/pressure. The one from the crank breather does. Not a lot - but enough to make the end of the pipe 'mucky'