I'm very happy with my Q90R , it looks like a serious piece of kit and sounds awesome, it sits nicely in front of my 65E8 LG OLED and doesn't obstruct the soundbar or screen.
I had some problems setting everything up, firstly Sky Q connected to the TV using ARC produced serious lip sync issues forcing a direct connection to the soundbar. I had similar problems with my E6 and that was nearly 3 years ago and its surprising Sky / LG still have not resolved the issue. I've used a 2 way switch from the Sky Q box so I can use the TV sound as well.
With only 1 HDMI port left for my Xbox One X & Nvidia Shield I went through a handful of switches and none worked except for this one :-
Free delivery and returns on eligible orders. Buy Univivi HDMI Switch 4k@60Hz 3 Port 3 x 1 HDMI 2.0 Switcher with Remote Control and Power Supply - Supports DTS-HD/Dolby-trueHD/LPCM7.1/DTS/Dolby-Ac3/DSD HD(HBR) at Amazon UK.
www.amazon.co.uk
So if you want to add some extra HDMI ports this switch works perfectly for me with zero issues..
Also I've had some minor handshake problems with Sky Q as others have mentioned in this thread, what I have found is with Sky Q on HDMI 1 anything being used on HDMI 2 needs to be turned off prior to switching back.