I've been on the testing panel for years and have been chosen for a few home studies. I only remember a few; one for the facial primer, a few for mascara, one for haircare, and one for skincare. My 2 favs were testing the Loreal Eversleek line before it came out (They sent a full size bottle of the shampoo and conditioner to test! The conditioner is now one of my HG conditioners), and the most recent was a facial cleanser test using the Clarisonic Mia. They sent 2 full size cleansers and a Clarisonic brush head. (one cleanser was the Clarisonic cleanser w/the label covered up, and the other is an unlabeled mystery cleanser which I just happen to love now, and I can't figure out what it is! I even emailed them asking what it is and they dont even know! Claimed the lab doesn't tell them what people are testing.)
Thank you products have included Essie nail treatments, Kiehl's boy lotion, various Loreal products. It's worth it, but it also makes sense to be honest w/your answers and your profile so you dont get something that may harm you during testing.