The Goliath is in my opinion the best ground to air unit their is. The Goliath has incrediable firepowe twords air but don't think is can't shoot ground or it will kill you in half a second. The Goliath is good for both offensive and defensive places. For defense it is really helpful against Gaurdians, Carriers, or Battlecruisers. For offense they are your air killers with the Siege Tanks covering the gound people. Goliathes are really good if their air attack range is increased. I use Goliathes a lot for ground to air but very rarely for ground to ground.
