I agree to the post saying to stop buying from Wilson, Head, Babolat etc. (major companies).
Most people do this because that what the pros use. I think that you should not force yourself to buy what the pros use and buy the ones you think will be the best for you! Some of the minor companies sell AMAZING overgrips that people dont even notice. But i am not forcing you to stop buying from the major companies because i do agree that they have good overgrips but this is just how you can save a little more money