MGM, the hugabub is great for littlies and newbies. I use it almost exclusively. I am changing to a mei tai soon and an ergo, but for this early period the HaB has been brilliant (it's a wrap so takes a few minutes to put on which is bothersome at times, but still worth it). Legs hanging down is not comfy for any age bracket. They have to have their knees higher than their hips or they can get back and hip problems later, which makes the bjorn the worst choice of carrier. this is a great article on carriers: Storchenwiege - Your Baby Sling | No need to slow down your active life - just bring baby along!
