That's fair.
You also have to update the software first, which is a 45 minute process that requires touching the brake pedal every 20 minutes to prevent the head unit from going to sleep.
I've installed it twice: a few years ago in a CX-9 and two-weeks ago in a Mazda 3. There's YouTube videos for it so you know what you're getting yourself into. I found the procedure straight-forward. Mostly you need to know which parts to pull off and where the bolts, clips and fasteners are. If you're someone who'd install their own dash cam, you can probably do it.