used it for the first time yesterday, worked fine. Had to wrestle with it a bit the unit to get a charge, but it was the charging station that was the problem.
Essential tool for Tesla owner
For trips away from home, I will be charging at either a Tesla Supercharger or a DC fast charger at a ChargePoint site or similar. Most everything else too slow for an in-trip charging stop. I charged at a 125kW CCS1 location soon after getting this adapter and it worked just fine. The site's CCS1 charger cable and plug was h-e-a-v-y !! but this CCS1-to-Tesla adapter clicked on firmly and easily remained well-seated in the MYLR for the entire session which ran at full speed, that is 62.5 kW for Tesla 400V battery system (-- only get 125kW if you have 800V system)