I have only been involved in one research study but visited the facility twice. Let me start out by saying I was treated very nice and received my compensation check super quickly. If interested, make sure to take into consideration the following factors: the building smells and kind of makes you feel like you’re in a dungeon or prison; there are hallways and more hallways you’re led down making you fear you’re about to be tortured; there are old ladies that will ask you a lot of personal questions«privately» meaning there is one foot of a sheet between you and the next person; and it is possible you won’t qualify for the end of the study you start meaning less money than you thought. Really though, it is a good way to make easy money for using a product and answering questions. Try it out.