Has anyone used any of these TV straps to anchor their flat screen TV? Just looking to see if they are worth it or if we need to look at other options. Thanks!

http://www.amazon.com/Anti-Tip-Furniture-Screen-Safety-Strap/dp/B007IVDP3I/ref=sr_1_7?ie=UTF8&qid=1382048426&sr=8-7&keywords=tv+straps