I just received my "Baby Bargains" book and realized that I must order a crib ASAP! (Apparently, high-end cribs can take forever to ship.) So, my question is: Are convertible cribs (which converts from a crib to a regular twin bed) worth it? practical? or just a bad idea? I would especially love to hear from moms who have purchased convertible beds if they actually converted the cribs into beds for their children or whether in reality that'll never happen because kids develop their own taste and demand certain decors when they grow older.