well I had my 1st in it all the time dont remember the excated amount of time as it was 7yrs ago, but he loved it.
DD1 hated it so it was never used and she had a walker and DD2 didn't use it as the heat had ruined the elastic so she too had a walker, but DS walked on his own at 11mth started to walk the furnture at 9mths DD1 didnt try to walk until 12mths and DD2 was 14mths Now I have no idea if it was because of the walker that my girls were slower to walk but I think when we have a 4th that baby will be having a jollie jumper if I can still by them.