I tried A LOT of different brands, coated, not coated, elixir competitors and some others, nothing compares to elixir in terms of staying alive for a long time. My sweat kills strings just after 3 days of playing guitar, elixir with intense use (1h+ daily) can last at least for 2 months, usually even longer. They might be expensive, but for me they are much cheaper considering how often I'd have to replace other strings