J.M.
The Bumbo seats are great. They really help babies sit up. The only downfall is that it does not support their head/neck. (and if they have chubby thighs it is tough to squeeze them in) It really has worked great teaching my little guy to sit (he is 14 weeks). There is a tray attachment that is good too. I would definately recommend the tray if you get the Bumbo.