For $20 it's well worth the money. A warning though, if you aren't used to exercising you WILL be sore, very sore. I had one of these that I made myself out of an old dumbbell, not surprisingly, this one is much much better.
Much easier to control than one big wheel. Amazingly if you use it right, it will work out all your ab muscles from your diaphragm to your groin.
Love the color and fit! Very comfortable! I'm 5'5 and 155 lbs and it fits me perfectly! I'll be getting it in another color!.
the design is neat, and i really like the water proof pouch. the bag looks small but can fit in a lot of stuff.
What a great backpack! Used this on my trip to Italy and there's so much space in it. It's water resistant and survived a terrible thunderstorm without making our clothes wet.