What you read about is not talking about a mini crib, it's talking about a portable crib...like a pack n' play. Those are not safe for long term because of poor mattress support. However, the mini crib is just fine. We used the DaVinci Kalani
for the first six months while living in a one bedroom apartment. Then we got a full size because we moved into a 3 bed house, but we kept the mini too because we want to use it as her "big girl" bed once she gets that age.