Bowel Cancer Treatment More Condition_symptoms Does Anyone Have Any Experience With Clinical Trials For Cancer Treatment?

Does anyone have any experience with clinical trials for cancer treatment? - bowel cancer treatment more condition_symptoms

My mother was diagnosed with colon cancer. It has not spread, but the tumor itself was big enough and you need chemotherapy. She had been invited to consider participating in a trial. This is a drug already in use, but for the later stages of cancer, are tests to see the advantages of its use in patients with advanced cancers less.
I've heard that if you are in a testing phase is a good idea, so much attention and care and their development follows very closely to accept.
I wonder if someone has experience with testing.