Basically, that's not a bad product. However, the balloons do not inflate without risk up to a diameter of 28 cm. From 20 cm wirds critical. We are unfortunately burst more balloons. In addition, the gas is not enough for all 15 balloons. It should be based on the purchase of 10 more balloons. Whether you want to spend on 10 gas balloons than 20 EUR each must decide for themselves.