How good is A340-300-sets,leg-room,comfort/coach class/etc.
Soon I will fly LH429-how good service is and is Lufthansa giving free headset if not any other airlines headset fits.
Thanks 
seatguru.com has seat maps for each of Lufthansa’s five A343 configurations; they appear to all have 32" legroom and 17.5" pitch which is mediocre. The A340 series are generally a bit quieter than the B777, so you may enjoy that.