Having had three children, I think it speaks for itself how much I value this product, having bought one of these seats for each of them as babies. The bath seat is very simple to use and my boys have all been comfortable, safe and secure when seated in this at bathtime.
Babies do need to be stable sitters before moving to this stage of bath seat, otherwise they tend to slump forwards slightly and can find their delicate area crushed against the central column. Once attached to the base of the bath, this is very secure as there are a number of strong suction pads on the base to keep this in position. I think this is an essential item for any parent, especially if bathing more than one child at once. This gives the parent their hands free but the reassurance that their baby is secure in the bath.
The recommended maximum age is up to 12 months, although I found that one of my sons was comfortable in this seat until he was two years old! Larger babies might find the legs space a little restrictive over the age of one, however, particularly when being placed in the seat and while getting out.
The only drawback to this design is how easily the underside attracts mould and mildew as there are a number of holes and nooks and crannies on the base. You really do need to dry this thoroughly after each and every use, otherwise it is impossible to clean thoroughly. That's why I've had to replace the seat for each child although, fortunately, I think this is an inexpensive product that is well worth the cost.