So we need a new montior as the one we have from DS is 4 years old and hanging on by a thread..it won't hold a charge and even when plugged in half the time isn't charging. We had a motorola with him and have loved it and had no issues. So now we are looking at the updated version of what we have the motoroal mbp36s or the infant optics. Anyone have either of this and have any likes or dislikes about either.