我是否應該退還蹦床?
I have ordered 蹦蹦床 and haven't received it yet. From the review I have seen fso far, It seems 蹦蹦床 doesn't help someone who is used to exercise daily. For example, I run 3 miles in 30 minutes three times a week, riding on elliptical machine everyday. Wonder if 蹦蹦床 has no effect on me. Should I cancel the order?