Any take on whether to use a baby walker?

I got both sit and push walkers already. Im letting my 4 mth old boy sit on the "sit Walker" now. To train him to sit n occupy his time with the activities ... I will wait till he is ready to stand n walk b4 I install the wheels for the sit Walker... N when I have time and energy.. I will let him use the push Walker... (I feel that the push Walker needs more supervision when in use as the babies will tend to fall very easier.. N is more prone to fall with their head hitting the push Walker) When im tired or need to do other chores, I will let him use the sit Walker I read that the sit Walker may slow down the progress of babies walking but I feel that if I dun have time to accompany or practise on the push Walker with babies, they will end up walking at a later age too So after comparing the pros n cons, I think I will let him use both