Boomers are very well known for guitarists around the world. I wasn't huge fan of them before, but they made me want to buy few more sets of these strings. Tone lasts surprisingly long time. I only noticed that they started to rust pretty fast. But funny enough, rust is only on high strings, on wounded ones-no rust even after 2 months of intense playing. They are very durable as well and don't break even if you bend them 2 steps higher. Ball ends are very well wounded so, there is no rust there too. If you have few guitars and you don't want to buy new strings for each of them every month, but still to have good tone. Grab these ones, and you won't be disappointed.