When searching online acoustic guitar forums everyone seems to refer to these strings as warm sounding. They're not. Maybe if you're comparing them to D'Addarios or similarly bright/metallic sounding strings but in the larger perspective these are bright strings with a rather strident, brash tone. It feels like the guitar is shouting at me when using these strings. The highs are metallic and the lows are kinda hollow. If I dig in hard the lows collapse into a bloated, boomy mess.
This metallic, hollow tone actually reminds me of strings for autoharps and zithers. I guess you would say they have great clarity but on a guitar it gets rather sterile.
At first I actually found these strings interesting because they are slightly different to other strings and it's always exciting to try something new. But it soon got old and so did the strings. These strings have a very short life expectancy and go "dead" really fast.
I didn't like how they felt under the fingers either. They have a very stiff, uncomfortably feel, although the windings are reasonably smooth and the tension is no worse than other .012 sets. I suspect the stiffness is the reason why these strings fail to produce warm, full lows and instead end up with a hollow sounding, boomy mess.
Strings are very subjective so I'm sure a lot of people will like these strings but personally I think these strings are rather poor and will never buy them again.