The insert is the only thing I really used for my son. I received this as a babyshower gift and was thrilled cause I didnt even think how I was going to bathe my little one. But I only used the slanted insert, and the tub was so hard his little kicking feet pounded on it, sounded painful. It leaked, and wouldnt stay clamped shut... so we just used the insert sling. That was wonderful, but you could buy that for a lot less money by itself.