yes Louie had one, its very good for keeping the baby in an upright position, instaed of a small baby lying in the pram/bouncy chair/car seat while we get on with things in the house.
for once the baby can see whats going on around them at an upright level! if that makes sence(?!)
good for feeding solids too when baby is still too small for a highchair.
Louie didn't like his to start with but you have to perservere, its a new thing for them.
we used Louies from about 4 1/2 mths.