Just a tip... never let a tech set your guitar up without seeing him take the strings from the box... especially if you're paying for Elixirs. He may have strung the wound strings with Elixirs and the non-wound string with some off brand. I would bite the bullet and take them off your guitar and put the in-box set that you have on your guitar and see how those are. Also, there are two types of Elixirs... nanoweb and polyweb. Check which set he put on. I've personally only used Nanowebs and I love them. Sound awesome and last forever!!! good luck