I installed the compact over the weekend. It went in very easily (although it was awkward due the weight and brackets being connected to the underside of my P1).
Once installed, seat position is virtually identical to what it was previously, it probably sits 1-2cm higher than previous, but not enough of a change to make me want to adjust my steering wheel or pedals.
As you can see from the pictures, the installed compact is virtually undetectable, I really couldn't be happier with it fixed this way.
In terms of the unit in use, so far I have had a bit limited usage of it and I must admit, I have never used any form of motion device previously, BUT so far I'm really impressed with it. Using iracing on the sebring with a skip barber I actually feel like i'm in the car going over bump after bump.
There doesn't appear to be any lag, the unit is very fast in operation and it also very quiet. With my VR headset on, I can't hear the unit at all, and when witnessing other people using it, you do hear a noise, but outside of the room is is not noticeable, in fact, the FFB on my wheel through the chassis probably is noisier.
Settings are very simple, once you boot up simtools, it automatically recognises the game you are playing and uses the relevant settings, which you can then adapt to suit with a slider whilst in game. The unit also has 3 dials on the front of it for on the fly settings, although I've not really played with any of these yet.
I'll report more once I've had more time with it.