Robin,
My husband was given good advice from his doctor's , early in his journey. The doctor's told him that at times he may not want to eat , but he had to think of food like you do medication and eat it for your recovery. He did like Boost plus and drank a lot of it .. vanilla only . I have heard many say that the chocolate is sickeningly sweet.
As for the feeding tube, he did end up having one, but not to be used for lack of appetite. He had to have a stent put in his esophagus when his tumor began to close in on that area. The feeding tube was put in as a back up measure if the stent were to become dislodged. We did use it on one occasion when he became very ill after some surgery. It is not hard to use, but would not be my first choice as a way to get nourishment.
Sue