I have read all the replies to this message and am a bit torn as to what to say. I have used the JJ for all three of my babies and did not think that there was any problem with it. I used to put it up outdoors under our patio and put a clam shell pool with a few centimetres of water in it in really hot weather and my babies loved it. (Under complete supervision). However, my daughter did walk on her toes for a long time after she learnt to walk, but grew out of it. Perhaps the JJ contributed to this?! I think differently about the JJ now for my next baby. If in doubt about something as fundamental as walking and development of healthy legs, why risk it? This has given me something to think about. Incidentally my other babies, both boys, had no leg or walking problems, so who knows?
Domestic Goddess Mum of Four!