My husband has been wearing the Optune device for over a year (diagnosed with glioblastoma in April 2024, surgery, radiation, 12 months of Chemo). He wears it around 97% of his time and seems not too bothered . He can take a shower with cap (illustrations on how to keep head dry). We have had good support and excellent response when ordering new equipment as needed. Perhaps it depends on the support person you are assigned? The literature suggests that Optune worn at least 75% of the time adds six months to survival rate. Although this is a generalization and each individual is different. We were given four batteries as well as a transformer. The batteries have lasted at least 3 hours each. We were provided a shoulder strap and a backpack to carry the device when active (although my husband prefers to carry it around in his hand). As a caregiver, I have not minded changing the arrays every three days... it gets simpler with time. I do wonder if I would be as patient with the inconvenience as my husband. It is a lifestyle choice and not for everyone. But we have had overall positive experience.