Bombo Stools for a bad back

I really love my new bar area/ pool room. We will have so many great parties in that space. I need to get some stools for the bar but they need to have a little bit of a back to them because I have a really bad back. If they could be height adjustable that would be great too. I saw these bombo stools on line and they looked just perfect. They have all the features I am looking for and it appears that the price is right. Since we put so much time and money into the new space I want to make the best possible choice.