Anybody use these?

Are you sure those are stainless? They don't appear to be.

Haven't used them, but I have used their ground wound phosphor bronze strings, as well as Nickel Rockers which are ground wound. I'm not a fan of either. The ground wound phosphor's only benefit is that they squeak less. They seem to break more as well, but since the electric doesn't have a wound G that might be a moot point. Nickel Rockers have too much of a "half way dead" sound for my tastes.

I like Fender Original 150s. They're the brightest pure nickel that I'm aware of (except for the boutique brands, Pyramid and Thomastik), and nothing like a muted or dead string, so if that in-between level of brightness be what ye seek, it maybe worth considering.

Of course, I haven't used those D'Addarios. They could be amazing. Never know until you try.

Ah, okay. I found it on there.

You can do a quick test on fret wear. Do an aggressive bend/vibrato with the low E on an upper fret and look carefully for marks left on the fret. Some of the more aggressive strings will leave a bit of a mark. It won't tell you much, but it'll give you a bit of a sense of how harsh they are without waiting for it to need refretting.

I've used stainless monsters exclusively for almost 30 years.

A couple guitars I've had now for 20-some years.

You can tell where I play (not cowboy chords, my wear patterns are DISTINCTIVE!), but never had to do a refret.