The gold collar is good, and the annual card has the highest cost performance. You don't have to go every day. It will be effective to keep exercising 2 or 3 times a week. It is recommended to have multiple cards. But there is a time limit for running out. Where to practice what you write on the device ... or see how others use it. You can also ask the coach occasionally. You can take a bath. It's free to store clothes, and so is the box. Take it with you when you leave. Don't ask me how I know. Don't mark with ink.