The guy in the original article was having a Power Wall installed. This poster had solar panels installed. The processes won't be the same.
The guy in the original article also had panels installed by Solar City, that went smoothly.
OP here. Yes, SolarCity panel install was pretty straightforward.
I had both installed at the same time and it was pretty close to the same. Just an extra permit and they had to have engineers inspect the roof and mounting planes.