I have been using this crib for 6 months now. It was time to lower the mattress today as my little one can now sit and wants to pull himself up. When I attempted to do so, the 2nd hole (for stage 2) on the front left side was not threaded for the screw. I am unable to use the stage 2 level at all. This was incredibly frustrating and I am outside of my return window for an issue that I would never know about until after use for several months. Beware. It’s cute and looks awesome in the room, but the function is lacking big time.