I have been using SOS on all of my electrics for quite some time now and decided to give their acoustic strings a try. WOW...great stuff. I have been using DR acoustic lately and the difference between these is night and day. The SOS were much louder and more full sounding. I couldn't be happier. I don't know if they will last as long as the electric sets will, but so far I have been mightily impressed by these strings. I would also like to say that dealing with Dean is always a pleasure. He really goes the extra mile to make sure things are right. One of my packs was missing a .12 string and he made sure that a replacement was sent out immediately. 2 days later it was in my mailbox. Great strings and great service. Great job guys!