Robust and simple.
This is essentially and adjustable plastic slope that you stand on! However if you usually do heel raises on the stairs you know how your toes "claw" on the carpet as you try to stretch your achilles/calves. This eliminates all of that and you get a much better stretch. You also have the option of stretching the inner and outer muscles by using the removable plates. Simple but it works. I tried out a friends and immediately came home and ordered my own. Over £40 for a bit of plastic sounds expensive but it is robust and should last the average person a long time.
Verified purchase: YesCondition: New