Yeh it was good. I've found others, seem to be the same product but for half the price, generic/cheapo brand, but for something like this, it's probably fine.A partially deflated similar sized ball works just as well..but falls to the ground. Great product.
The pro that owns tour striker...Chuck Martin talks a lot about holding the club with "volley ball arms". Imagine how your arms are if you were to pop a volleyball up for someone to spike it. He says to do your swing from start to finish with that feeling (keep them connected and in front of your chest). The ball squeezed in your forearms gives that feeling.