As an "hour a day" player, these strings last for months at a time without any tone sacrifice. Usually with most strings, you get to that second month and you're like...eh, if I weren't so lazy, I'd change my strings. Let the laziness spring forth with Elixir. As always, great customer service and order fulfillment by the lads at Shoreline Music.
This is the same review I did for the Elixir PB lights which is what I generally use. The review applies equally to the Elixir 80/20 lights that I just purchased. The reason I tried the 80/20's this time was for a particular Rosewood/Cedar acoustic guitar that I have. It's an incredible sounding guitar but to my ear, I wanted a bit more clarity and brightness for the style of music I play. I put them on and it did just what I was looking for with all of the great attributes of the PB's that I detailed in the following review.
In my experience, Elixirs sound good when you first put them on but sound even better after they're on a bit and "played-in". They have that nice, bright sound that a lot of folks really like when putting on new strings. The difference is that it lasts, and lasts, and lasts.
I play fingerstyle guitar, a lot, and though most people are impressed by the way they feel on your fretting hand, I find it makes a difference on right hand nail longevity, as well. I do like the fact that you don't get the "string zing" that's normally inherent in uncoated strings, though that's not a terribly big issue for me.
If you like to change strings - don't buy Elixirs. If you want a great sounding and feeling string that lasts a LONG time, then Elixirs just might be your favorite string.