Research Chemicals & Shit

Are research chemicals n shit really as good as people say? Like people say that they're like legal alternatives to good ass drugs and shit and idk if i can just go along and believe that. examples of this would be
https://syntharise.com/products-page/
https://www.buckled.eu/
https://www.chem.eu/index.php?route=common/home
https://www.sacredkratom.com/buy-kratom-capsules (this kinda, i alr know kratom is good & it's not a research chem, but it's in the category)