Review on Boon 3 Stage Bathtub Babies White by Ebony Brown

I love the effective 3-in-1 design that can be used at all stages of a child's development. However, my newborn sits too high above the water in position 1, so I use position 2 as she finds it more soothing and comfortable. In both positions it tends to slide over the seat/liner. As she moves her ass slowly slides up the seat and I have to reposition her. I feel like the insert/seat could have been designed better to hold it in place.