I tried it once on bicep curls, positively dreadful.
Squats as well twice, ROM becomes very restricted.
I've found it works best on occluded walks and leg extensions or leg curls.
James 1:16-17 ESV
Do not be deceived, my beloved brothers. Every good gift and every perfect gift is from above, coming down from the Father of lights
With God's help...Mens sana in corpore sano