This research trial studies quality of life after bladder-preservation chemotherapy and radiation therapy (chemo-radiotherapy) in patients with bladder cancer that has spread into or through the muscle layer of the bladder (muscle-invasive bladder cancer). Bladder-preservation chemo-radiotherapy is a standard treatment for patients with muscle-invasive bladder cancer, however, chemo-radiotherapy may cause urinary tract, bowel, and sexual late side effects that negatively affect patients' quality of life. Studying quality-of-life in patients with muscle-invasive bladder cancer after chemo-radiotherapy may help identify the long-term side effects of treatment and may help plan the best treatment in the future and improve patients' quality of life.