Does this really work great?

putting lotion on then putting saran wrap on the feet over it then socks? and sleeping over night like that?

how soft should my feet get? does it help my toe nails?

could I do it on my knees,and elbows or would the saran wrap slide off?

have you done it? How well did it work 1-10? any tips for super soft and healthy looking skin?
any other beauty tips for nails, hair,etc.?