I thought I would chime in as I received mine yesterday, ran through the unboxing and setup. My initial impressions are below, and happy to answer any questions that I can.
I still own the LG C7 65 and while I didn't need to upgrade, a line developed in my C7 and with the warranty having expired, I am waiting on LG Case Management to let me know if they are going to fix it or not, not holding my breath. Luckily I am in a position to upgrade, and after having setup my mom's C8, I liked a couple of the features in the C8 so I took the plunge for the C9.
Unboxing was pretty easy, though it does require 2 people to lift out and setup etc. If you did it by yourself, congrats! 4 screws into the back for the base and 2 more for the front facing stand piece, stand it up, peel off the covers and you are golden. I did forget that you have to lay the TV down flat on its screen to screw in the base. This is still very nerve racking since you just bought it, so make sure you have something soft and large and stable enough to rest it on.
The base - wow that base is heavy. I am glad it is heavy, but it is probably the heaviest thing in the box. I think the base is the same as the C8, but it seems more of a black finish than I remember and see in the C8 pics. The entire back is black where my C7 is bright white. Overall just looking at it, from the front, it definitely feels darker and more pleasing with a less distraction feel.
The cord holder on the back is a pop-up piece of plastic where the cords run underneath and down the back. It isn't terrible, but running 4 input cables and the power cable through it isn't the easiest thing to accomplish. The C7 had a simple plastic prong on the back that worked pretty well overall for me. While this new holder isn't bad, there is probably a better way to do cable management in the future.
Setup was really simple, enter in some location info and time, agree to let LG and their partners steal all your information, set-top box setup/recognition and I was viewing content. You can watch videos of that process on youtube if need be.
Initial impressions on the setup. Comparing it to the C7:
1. The sound setup was super simple. Having had trouble with the C7 ARC pushing sound into my pioneer receiver, the ARC on the C9 found it right away and stayed consistent. I did notice you can change the sound input from BitStream to PCM which made my Xfinity 4K cable box do some odd things like only outputting stereo in the options menu, versus in BitStream giving me the Dolby options.
2. The Motion Smoother is the same overall, but there is a On/Off button now for "OLED Motion". This may have been in the C8, but I don't recall. It darkens the screen and sort of puts it into a different state of viewing. I don't dislike it, but having the screen darker can be off putting. In the manual it says it will control the brightness to assist in a smoother picture.
Otherwise it feels exactly the same in terms of picture quality, with a few more options in terms of customization. I am not a purist in terms of picture, so I run my colors really high, the contrast and OLED Panel high, and I like the picture smoother, so perhaps a hyper realistic picture to most.
My only issue so far is getting the Alexa integration. I ran the setup, but can't get Alexa to find a new device. I will try again, but so far no luck. Also, I have a Harmony controller that controls the tv and entertainment system overall and there is no option for the LG C9. I assume it will come with an update soon, but the C8 is the only one listed in the Harmony app so far. I didn't try the C8 option, but it may work as well.
For the Magic Remote, it is working good overall, but it doesn't control my Xfinity 4k box very well. Since the 4k box is rather new, I didn't expect it too, but you definitely can't have the remote control the box perfectly. For instance, the LG guide feature is nice with some cool options and is quicker to use than Xfinity, but when you select a channel to watch, it doesn't change the channel on the Xfinity box. Again, perhaps a future update with correct this.
Anyway, thanks everyone for the updates from your side, and I hope I can be of help until the official reviews go live. Cheers!!