Mackenzie loved the walker - as she didn't crawl it allowed her to get around. She walked no problems at 13 months. I've heard about the tippy toe thing too. One girl at mothers group was told by her MCHN to put it away for a little while as her littly wasn't trying to walk. Once it was away he started walking within the week but who knows? I would use it again with our next one as Mackenzie had no side effects from using it and I was always with her to supervise.