Has any one tried a CG-Lock Lap Belt upper body restraint?

[YancyJohns]

Has any one tried a CG-Lock Lap Belt add on? For those w/ a factory 3 point lap belt to help in upper body restraint . Looks promising for keeping you in your seat for a factory look. I know it can not take the place of a full racing harness but may help anyone w/out one. I thinking of ordering one or two.
http://www.cg-lock.com/index.html

[wiedemab]

Billy Utley had some (or something very similar) at Gingerman that he was using in his Subaru. They seemed to work pretty decent. You could shoot him a message and get his thoughts.

I was going to use them in my Vette, but the damn seatbelts have dual retractors so they wouldn't work all that well.