The install was relatively straightforward. I had an airbag light on for a week that I couldn't figure out and they sent me images of where to plug in the harness I hadn't plugged in. The Harness had a sticker on it that said 09-16 airbag extension. If you are hesitant, you need to have someone else install it. The harnesses mostly all make sense.
However some things like the antennae harness didn't work and I just plugged my antenna straight into the unit. Its' definitely not stock and has some quirks and shortcomings.
If you push one of the truck temp buttons under the vents to change the temp, the A/C comes off auto. If you adjust it all on screen it works fine.
There's some trial and error to figure out some of the setting and set the temp to Fahrenheit and get the correct time zone. If you are familiar with an Android tablet it will help a lot.
I think it was a good decision, The Toyota head unit is so behind everything else in the market. Especially my 08.