I have 1 of these in one of my cars. I really like it and it works very well. I wouldn't say they work as well as a harness so for track-day use, I still have harnesses. But for driving on roads where you need to lean forward to look properly at junctions etc - they work very well.
I also leant mine to some friends so they could see what they were like before buying. A couple bought them, only one didn't and that was because of the seat belt being positioned low, the CG-lock risked marking his interior - but his was the only car with this
problem (an S2000)
I found mine worked best when I had a shed of a company car for a while, one that handled like a boat..... without the CG-Lock I was risking scrapping my face against the side windows while going around round-a-bouts!
