Hi
I don't want to give you an opinion as to the wisdom of participating in this study, as I don't want to influence your decision one way or another.
All I will say is: "Ask your questions and thereafter take the time you need to reach a decision on your own without the influencing opinions of others."
Only you can make this decision and thereby bear the responsibility for it, one way or another. All people have an opinion (and are entitled to it), however, not all opinions are necessarily wise or based on enough knowledgeable fact and experience.
All the best,
Anthea