Deborah’s springs are the best I have ever used. First of all they last forever!! They are made correctly and have never broken or failed. I don’t know why the others can’t figure it out but Deborah has the secret! I like the leg springs because the side to strength ratio is perfect. It’s a strong spring but at the same time not big and bulky. I use the chair/reformer/cadillac spring as well and that is a super spring. I love it for tower end of caillac. Arm press and leg press series perfect with these springs.