I tried these strings about 3 months ago, and they have a nice tone, I used only Pro Arte strings and decided to give a chance to the new EXP coating. Wow, great sound from the first day, great feeling, and yes, tehy last longer, much more. I am a classical guitar student, and if you don't want to save some bucks, buy these strings, they are not the best for a recital or performance, but great for daily work. Nice D'addario.

I bought one pack of "D'Addario EXP45 Coated Nylon Guitar Strings Normal Tension" some months ago at a store and started trying to put them on my classical guitar four days ago. This didn't go well -- they required much greater than normal tension and wouldn't hold a tune. Since this is sometimes the case initially with classical strings, I set the guitar aside over the weekend to let the strings stretch slowly. Today, I tried to tune the strings and got the same problem -- failure to hold a tune (particularly in the B and high E strings), and alarmingly high tension. When I noticed that the top of my guitar was starting to deform under the tension -- and the nylon strings still weren't up to pitch! -- I gave up and ditched these strings. I don't understand the problem, unless perhaps it's that they packaged high-tension strings in the normal-tension box. I have never had a problem with strings before, from any maker, and have had good experiences with D'Addario's Pro Arte classical line, but wow, these strings were simply unplayable. I assume there was a screwup at the factory. Very strange. I'm still perfectly willing to order D'Addario Pro Arte strings, however.