Next step beyond the 15 mph calibration drive, was to go on the road and see if they will auto correct or get more data.
After a good 8-10 miles drive, my readings are just all over and the App it's constantly warning me that my tires have high pressure and beeping. Sometimes the temperature discrepancy from one side to the other is more than 5 points (but then again road conditions, traffic, lanes, etc could be impacting them).
I tried the reset and calibrate again, but end with the same discrepancies.
Initial thinking tells me I either got a faulty unit, having nitrogen on the wheels should make the readings even more accurate, very unlikely to be the issue here, another 2 options are either the sensor is having issues interpreting the run flats data (as that gives the wheels solid sections that are note present in most cars or the OEM TPMS is interfering with the Nonda readings.
Only quick solution I see is maybe have one of my friends try the system (in case I got a faulty one) or get ship it back and get a replacement (what do you think @Julieta ?)
On the next 1-2 weeks I'm taking the car to the dealer, I will ask them to fill the tires with regular air and see if that makes a difference and provide with an update.
The manual is simple and straight forward, kudos on that.
**I will love to see Carplay integration of the ZUS App, to make access easier and friendly (maybe something like split screen, left side car diagram with pressure, left side reading lines per tire with pressure/temperature history).