I just tried this and here's what I did, for what it's worth...
Remote started GX with climate settings set to 74, drivers heated seats on and heated steering wheel.
Coming out of the neighborhood it was getting hot so I turned down the heat to 66.
As I was stopped at a light, I turned off...
I used Woodfield Lexus. It was pretty straight forward.
What vibes are you getting?
As for the all weather mats, I wouldn't pay for the Lexus ones. Money would be better spent on an aftermarket brand IMO.