Great for someone with balance issues and also for someone with bad knees.  I use it for both.  Gives cushioning for when I kneel down in my gym.  I have my own I bought several years back.  This I bought as a gift for a friend who also works out and has bad knees.  Very durable and wide enough for someone with large feet - I wear a women's size 11-12 (or a men's 10-11).