this cage is awesome!  it is just what we were looking for.  our two parakeets are so happy in it.  sturdy construction and it was super easy to put together with two people - which I would recommend.  shipping was also super fast.  arrived well packed and no damage.  would be good for 4 parakeets with plenty of wing space.  think more would be a bit crowded.  we got the 1/2" bars.  think the 3/4" would be a bit large for the keets.