It is small and convenient but covers the entire back and of course the legs. Personally, I got it for recovery after running and I can say that it does the job although I would like it to be stronger and sharper in its corners in order to apply more pressure. However, for its price, it is worth it.

Sturdy, relatively lightweight, quality rubber on the casing, good construction.
I am quite bothered by the bulges it has when I roll it on my back, but this is expected.

Good construction and quite stable.
Bulky.
Not very easy to use, if you are not familiar or professionally involved in the sports field.
Relieves the gastrocnemius muscle after running, which is why I bought it.