I have a push walker as well, but when I think about it, I think babies require something sturdy to pull themselves up on.
When they are learning how to walk, push walkers don't seem to be very helpful. A coffee table would be more useful for them to hold on to and support themselves, since they are very prone to falling.
It looks more suitable for toddlers who have already learnt how to walk.
http://www.whattoexpect.com/first-year/standing-up/