Reading the Capacitive Soil Moisture Sensor v1.0 with a MCP3008 and a Raspberry PI

I just posted this over on the Adafruit Customer Support site and was wondering if anyone over on this site has any experience with this.

https://forums.adafruit.com/viewtopic.p ... 32#p656632

The short story is that I am getting inconsistent and seemingly unreliable readings that I don't think I can trust.