In general Elixirs tend to sound less bright at the start than typical non coated strings, but sound fairly bright for much longer than typical non coated strings. So you don't get the initial new string brilliance - but you get good tone for a much longer period of time. That being said there is clearly a lot of difference with particular guitars, playing style body chemistry etc. I do find for my style they squeak less than non coated. After a few weeks of heavy play (or months of non heavy play) the coating can start to turn fuzzy at which point it is best to change them no matter how good they still sound.