It's guite ok. The moving range is not as good as with the original model, but still good for travelling use.
I'm a beginner, but I immediately found a feeling with this board. my balance and stability improve with each use. the components are of quality and if you follow the advice the learning curve is fast. the ball is currently inflated to 4 psi
Getting your balance back was very much like learning to ride a bicycle again. Initially difficult with a lot of falling off and getting back on. Like anything the more you use it the easier it becomes. I have found that the initial pains in the ankles and knees are now much less and the balance is improving. I was have to say skeptical but this looks like a great way to regain your balance and fun in many way so much so that cats have taken an interest too :-) Would I recommend this most certainly as it is a well constructed and thought out product!!
I cannot stop using my skillboard since I got it!!!!!!!! It's amazing!