Bumbo was recommended to me by SIL. I sisn't use it much before 4 months but now it's great to feed solids and so little one can be involved while we eat or I cook.....I have a HUGE island bench and put him in bumbo in the middle and cook while he sits and watches and plays with things. I mut say I have barely used the tray but I imagine it will be useful when he starts on finger food soon.