Ok, so one day I go to Guitar Center during this sale, and right before I walk out, I go and check out a box that says $5. I then found a pair of D'Addario EXP bass strings, and just buy it just because they were $5. Then a few days later, I visit my local patron private-owned music store and see that those strings I bought cost $60 or $70. I was like whoa! Why are these strings so great, I haven't put them on a bass yet, so I don't know what these strings are about. Are they much better than the cheaper D'Addario's I always get? Please tell me how good are they as far as sound goes, and how long do these strings last. Thanks.