These are really neat, but I know someone who got one and couldn't figure out how to use it. They are confusing, you may want to have someone show you how to do it before you buy it. The digram looks pretty self explanitory, but I know I would goof it up somehow, lol!!!
I think they're a great idea. It does take a couple tries to get really good at using them. And I know several people who have used them & no one has dropped their baby! As for falling - at least this way your arms are free to catch yourself. I fell once carrrying a baby in my arms - terrifying 'cause you wanna protect baby but you can't let go to catch yourself.