Wow. When I first used the Ab Carver, I was trembling. The next day, I was hurting. If you are consistent with using it, you will see results. Caveat: if you have a bad back, start off slowly. . meaning do not extend the ball too far out. It will put a strain on your back. As time goes on, you will not only be toning your ab muscles, but it will strengthen the back muscles as well. This is a good product and a true step forward from the single 'wheel on a stick' design. Glad I made the purchase.
It feels sturdy and doesn't cause paid. I haven't experienced bruising from this product and I tend to bruise easily. I just did the MURPH run and I was happy to have this roller for recovery.
It's cozy and warm, and it can handle any weather that was dished out. It is heavy, and my only complaint is the wrist Velcro straps did not hold and were very grabby. Bought for a December Europe trip.
Will continue to by Aikiki. Aikiki makes great products and stands by there products. Excellent shoe. 2nd pair.
I buy this brand because the fit is always perfect. There are comfortable for all day wear and give enough support that they feel great on my feet.