Daryl,Bill, Thanks for the Retro Monel video. Intriguing. In your opinion how do the highs and lows compare to the other strings you've used? How often do you normally change your strings? I'm curious as to how long the Monels will last on your guitar.
The overall sound is not as metallic sounding as PB or 80/20. I suppose many people like that timbre, I do as well; but the retro strings are warmer/mellower. The retro highs ring beautifully, the lows, while still loud enough are more woody, as opposed to metallic. It's hard to describe. They are really easier on the fingers, however you have to be careful to be gentle because they can go sharp if you press too hard.
I change my strings on average every 2-3 months (that's for Martin's Lifespan strings). My rule of thumb for string changing is not really time though. I go by two main factors: when I'm spending too much time tuning (I'm a perfectionist about tuning) and when the strings start to feel stiff from work hardening. Sound goes along with those two factors but out of tune and stiffness usually precede loss of sound. The jury is still out on the Monels because I've only had them on the guitar since 12/11/15. They sound better the more I play them. Since they are metal, I'm sure they will work harden too. It's just a matter of time. I'll let you know. At $7.00 a set (Amazon) they are worth a try.
Bill