I personally tried PRP therapy after my hair transplant, and I found it to be somewhat beneficial. I noticed some regrowth and improved thickness in my transplanted hair, which was a nice bonus. However, I didn't see any significant changes in my non-transplanted hair, so it didn't fully meet my expectations.
In terms of cost, I paid around $500 per session and needed multiple sessions to see results. It's definitely not a cheap option, so I would recommend weighing the potential benefits against the cost before deciding. Overall, PRP therapy was a decent addition to my post-transplant care routine, but it's not a miracle solution.