All user reviews of 2/5 for the Martin & Co Traditional 80/20 Bronze

Purchased at the time to fit yet another guitar "emergency", I installed a game on one of my Ovation and the least I can say is that this is really not terrible. The lack of consistency, completeness, balance of short musicality. This gives a narrow sound that can not meet a quality guitar. However, I understand that on an acoustic at 100 €, the Martin can make all the illusion that they have the advantage of a very low price. But for two or three dollars more, there is so much better than it ultimately absolutely not worth it at all.
Forget it.

My opinion is on the light (12-54).
I no longer use them for some time, replaced by much better (but more expensive) Elixir.

They are very bright at the beginning, both in sound and in appearance.
After 2-3 days, they become dull color "bronze oxidized", it clings to the fingers and the sound is "dull" or stifled.
When amplified, all the strings do not sound the same level, something that does not happen with other games.

In short, they are not expensive, but not worth more.
A choice I do not remake.