I'm stressed because my hair is thinning noticeably. Has anyone seen results from hair loss stem cell injections?

I'm still too scared to get a hair transplant, so I've been looking into this option. Haha. I'm really curious if the effects of hair loss stem cell injections are certain before I go for a consultation. Haha. It's really hard to decide because the explanations vary from hospital to hospital.

Could anyone who has actually received the treatment let me know how satisfied they were?