I am a believer after trying this sous vide method to cook steak. It is never overcooked and dry, I think this is the best way to cook an expensive cut of meat. Although it may take more time to do it, your patience will be greatly rewarded. The active working time is so minimal that I can literally walk away after setting it up.
Sous vide is not new (French meaning "under vacuum"). It has been a well-known French cooking method for hundreds of years. By submerging food that has been vacuum packed in a constant temperature over time, no moisture is lost and the whole piece of meat/food is consistently cooked to perfection.