Review on StarTech.com Thunderbolt 3 to Thunderbolt 2 Adapter - Connect TB3 Laptops to TB2 Displays/Devices - TB3 Certified Converter - 20Gbps/10Gbps Speeds - Black - Windows/Mac Compatible by Troy Larson

Purchased to connect a Focusrite Clarret 8PreX audio interface to a Lenovo ThinkCentre M920q equipped with an OEM Thunderbolt expansion card. I first bought an Apple adapter and it worked and connected well but the audio was buggy. So I paid twice as much for this item, and it's literally an inert piece of plastic. Might be a bad block but I don't have another TB device/computer to test with. In any case, I strongly recommend considering an Apple device before paying twice as much for it. Also, FWIW, I was able to fix the buggy sound by reducing the buffers.