What others have said and done:
Louis Simmons of Westside Barbell tried it out and here's his comment:
"The Free-Spotter is a great innovation for any lifter who trains alone or prefers to go to failure."
Adam Mamola, world class bencher
Bill Gillespie, past NFL strength coach and world champ lifter
Matt
Christie, a very winning powerlifter
Cory
Rideout, competitive powerlifter, combat arts practitiioner,
and long time Free-Spotter user
Some independent videos by users: