I have used the Lectron CCS Adapter twice on a Model X and a Model 3 at Electrify America stations at 150 kWh. I was able to get between 90 to 100 kWh while charging. It's not as easy as at the Tesla Superchargers but it worked fine and definitely opens up the options for charging when traveling.
I received the adapter a few weeks ago, finally got around to using it. It's got some weight to it, you can tell its constructed well. I tested it out at a local electrify america station. With my batter at ~55%, I got 79kW out of the adapter first try. That's all I needed, now in a pinch I can charge at EA stations.