Guitar strings for hubby

I remembered in our college days when my hubby requested me to buy him a set of strings for his guitar because he wasn't able to go downtown just to buy those. So after my class, I went to the mall to do his request. When I gave him the strings, he was not happy because I bought a bad quality of strings.

So the last time he let me buy strings, he told me the particular brand Savarez guitar strings is his choice. That time I am sure that what I bought for him was the right string that he wanted.