I bought a knee scooter for my grandpa since he got injured and doctor recommended him to walk over a scooter. This is good and he also like it. However, I would like to buy a better piece than this one if possible. Otherwise, I have a list containing 6 top scooters; but unfortunately I don’t know which one is best for my grandpa. Anyone there who can guess the choice, if yes please let me know, I will then share the list with you. Thank you!