No flexibility at all. Be careful: once registered, your money is blocked. The registration includes a tick box agreement (written in german) that legally blocks your money and it is only refundable for "valid" reasons according to the school direction judgment. I have tried most of the german schools in Baden where try-lessons and refundable courses (without giving reasons) are common practice. AVS has been by far the worst experience I've had during my german learning. read more