From my experience the side effects of treatment are minimized, while the efficacy of the treatments are exaggerated. I have had to switch treatments 4 x in 11 years. Each time I was told that this treatment would help me live a normal life with a normal life span.
On the opposite end, I was told that a full molecular response would not be achieved. I was able to do that twice.
As it stands, I pay little attention to what is said to me, and a whole lot of attention to what my body is experiencing. That is what has alerted me when things have gone sideways. With the help of specialists outside the field of oncology I was able to bridge the gap.