I must have missed this ESC70 thread, as I feel like I absolutely responded in one. It's been 10+ months since I suffered through the debacle that is the ISDT ESC70, and I still get a YT comment once every couple of weeks from people saying theirs "works perfectly." Well, good on ya. But everything in the chain is flawed-- software, firmware, hardware. Mine never worked quite right, and now sits in the box it came in, likely never to see rocks again.
The final straw was that the ESC would somehow spontaneously lose calibration, disable the motor, and say nothing of it. So I'd power the rig up, have steering, but no throttle. Would have to launch the app, hope it would connect, then delete the ESC from the app, reconnect, and start over as if it was the first time ever using it. I would do this sometimes more than once a day. Different radios, different motors, different servos, nothing mattered. If they've gotten the bugs ironed out by now, great. But they don't exist to me. The venerable 1080 just works. The actual best part about the 1080 might be that it doesn't have an app.