The way the system is designed seems extremely unreliable. The sensor is setup to detect change in ride height, not weight. In theory you should be able to tell how much weight is in the bed by how much the ride height changes, but once the suspension settles a bit it will be out of calibration, then after a few years of heavy use it will show that you have 1000lbs in the bed when it's empty.
The only way this could be considered remotely reliable would be if there was a button on the screen to zero out the sensor when the bed was empty to keep the software calibrated to the sensor. Doesn't look like the user has that ability from this article.
The other big thing is that the system is accurate to plus or minus 200 lbs, so up to 400lb variance in the reading.
This is an expensive toy at the very best.