The standard Toyota headunit (with software from 2012!) needed replacement with a more up to date unit. This Dasaita unit has brought the car into the third decade, with plenty of connectivity, Android Auto and Apple Carplay, among all thinkable other apps. The screen is nice, big and bright and the responsiveness is fine. The sound quality is also fine, for the average user. Don't expect high-end sound.
I built it in myself. It is basically plug and play; every connection at the back fits only one possible original connector. With a bit of patience and logical thinking, it is easy to do. You need the logical thinking, because there is no step-by-step connection manual, only a sheet with small pictures and a list of parts. The so-called user manual is also nothing more than a list of available functions. There are no instructions on how to use them or how to make the best use of them.
Make sure you keep the original OEM front that you replace with this unit. You need the white and yellow clips from the back to make the new panel fit properly. Also, don't be afraid to give the new front a good bash to get it to snap into place.
You need to run a few wires through the dash, A-pillar and roof-lining. The OEM microfone in the roof and GPS-antenna on the windshield do not work with this unit, so you need to use the new unit's microfone and GPS-antenna. The wires can go from behind the inside mirror, neatly above the roof liner, to the A-pillar and behind the liner there, to the side of the dash at the passengers side. The lights-unit in the roof, the side panel of the dash, the front panel of the dash and the glovebox easily come off, so you can run the wires to the new unit. The Wifi-hotpoint antenna has a slightly shorter wire, and this flat antenna fits nicely in the A-pillar as well. The liner of the A-pillar comes loose just enough to run the wires. Don't try and force the liner off, because there is an airbag in the A-pillar, which might deploy.
The new unit does not need to be screwed to the actual frame of the dash, like the old unit did. It is quite lightweight, so it stays in place by the replacement dash-panel alone.
I've tried a few apps over the last weekend and it works fine. The load times of the apps could be shorter, but I suppose a 6GB RAM isn't all that fast to begin with. Again, it's fine.
So my overall impression is that this unit is fine, if you don't have high expectations or specialist requirements. It matches the car perfectly in that repect.