i think that Elixir strings are the best compare to others brands, because you pay more fore strings that will last longer and will conserve a fresh sound. I have this strings on my Fender Jazz Bass for 5 months already and the slap sounds brighter and new, just like in the first day when I put them on. I think I won't change them in the next 3 months, because they are not even rusty or dirty. I advice taking care of them with a string cleaner solution for preserve them for getting old