The round shape is missing for the little ones of the starting point to draw the corner protector again, which happened to us in an enlargeable corner protection. The fact was open at the bottom, so that our son needed only poke the finger, pull sharply once they were from.
That does not happen so quickly in this corner protection. However, the adhesive surface is weaker after some time and get curious mice then also removed.
However, this corner protection was far from all that we have tried, the most durable.
Not suitable it is for rounded corners, since the adhesive surface for a fixed installation is too small.