These are pretty cool devices because you could wear this while doing all sorts of body weight exercises.
I would try and spend some extra money on one that is adjustable in size and able to increase the amount of weight you put in it.
Not really sure about walking with it and how many more calories you will burn, probably a decent amount more.
It's lack of faith that makes people afraid of meeting challenges, and I believed in myself. ~Muhammad Ali
You must have long-range goals to keep you from being frustrated by short-range failures. ~Charles C. Noble
July 6th 2010: 225 lbs, 24% body fat
Nov 30th 2010: 181 lbs, 12% body fat
Dec 28th 2010: 177 lbs, 11% bf
Total weight loss 48 lbs.