Bought 2, one for each of my sons. Very sturdy, not flimsy in any way. Adjust exactly to the height they need. Very happy with this purchase.

I looked at a lot of wobble styles and this one is fantastic. My son loves it! It adjusts up and down, wobbles and spins. The base stays stationary for spinning. It will be perfect for expending energy so he can focus on school work. He actually is excited to sit at his desk now! The quality is excellent. I couldn't be more pleased with this purchase. Worth every penny!

They do what they say. They are very hard to push down and require an adult.

Doesn't go up and down as easily as I would like

This is a sturdy stool. I spent twice as much for this stool because it is adjustable. Unfortunately, it IS adjustable and my hyper 8 year old grandson cannot leave the adjustment alone. It takes all my weight to push it down to his proper adjustment. He spins around, which provides him with another way to be scolded by his virtual school teacher. I don’t see an advantage in having a wobble stool. It seems to have two drawbacks over the stool or chair I had provided already.