The installation of this head unit is about as easy as it gets. You really can't mess it up. Everything works as intended and it looks amazing installed.
This is a significant upgrade especially if you are in a 2010-2014 4Runner like I am. Is it a necessary upgrade,? No, but it does a fantastic job of elevating the interior and technology to modern times. It adds the ability to add any app available through Google Play; or apps available for use with Apple CarPlay or Android Auto.
I have a couple of criticisms but by no means are they overly concerning or deal breakers. The volume for the radio may need some tweaking because it is loud after install. In contrast, streaming via bluetooth or wifi is not as loud. If you never listen to the radio and only listen to Spotify or other streaming services like me, this likely wouldn't matter to you but thought I'd point that out. Nevertheless, adjusting the volume settings can be easily accomplished by tweaking the amplifier and EQ settings.
Another criticism I have is with the Google Maps on the home display. It does not give the option of selecting another nav service, such as Waze, like CarPlay does. Additionally, the location icon jumps vs moving smoothly on home page and it only shows an overhead view. If it can be changed to 3D view that would be nice. If it can, I haven't figured it out yet. But... jump over to the Google Maps app itself (or Waze) and it works exactly as you would expect--nice and smooth. Keep in mind, if you use CarPlay or Android Auto this really is a nonissue.
The benefits and the value of this head unit far outweigh any criticisms I have. Overall, I highly recommend this head unit. I wish I would have bought it sooner and would buy it again!