How effective is the hair loss treatment?

As I get older, my hair isn't as thick as it used to be, so I am considering hair loss treatment. I didn't used to worry about it much, but the thinning look on the crown of my head is becoming stressful. I've been using hair loss shampoos, but they haven't been very effective, and my worries just keep growing. If anyone has undergone hair loss treatment, I would like to know how effective it was. I also want to know if the cost is high and how long the procedure takes. The advertisements make it look promising, but I am curious about the actual satisfaction levels. In particular, I want the results to look natural without being too noticeable. Is extensive post-treatment care required? I would appreciate it if those who have received the treatment could share their experiences regarding the results.