DrZaius.
I personally like Capillus more. They have one of the most prominent doctors in the world of hair loss dermatology on their advisory board.
Having said all these products are expensive and the ROI is very minimal. Do not expect a dramatic change.
Interesting story about how LLLT was discovered for hair loss, was they were trying to study LLLT for wound healing on rats. But they realized that the wounds they were exposing the LLLT too were becoming hairier very fast and the research assistants were getting pissed cause they had to keep shaving it more often.