The car feels better now, while it is stiffer, it's not massive. There is a little more road noise, but it's not really noticable if you don't have the radio on. and your paying attention for it. You can certainly notice the difference between the max soft vx max hard setting. I would be fine to live with the max hard setting but the wife's not overly fond of it right now.
If you are looking to do this yourself, this clip covers what you'll need.
To get access to the rear coil overs in the Levorg, they sit under the side floor panels in the trunk. The are held in by 2 black push clips.
The coilovers come with no details at all and the internet is full of guesses, one video even suggested it was already pre-set, so I contacted them directly, their recommend 5mm preload for this set.