Compared to my old set, these Larsen strings are unbelievably smooth. With the right rosin and a good bow, they respond remarkably well. Your mileage might vary depending on the cello you have in terms of the actual sound characteristics that you're going to get, but my electric NS Design works fantastic with these strings.
The A string is the smoothest one I've ever used on a cello. Going up really high is mellow and pleasant, without any guttural or tinny overtones, while all registers provide fast response. I'd definitely say this string is similar in character to some non-metallic strings I've used in the past, or at least the sound itself doesn't have too much metallic characteristics to it. It's a pleasure to play on it.
I'm still getting used to the D string. It's definitely slower than the other ones in this set, but maybe it takes a bit longer to play into. It seems that the tension is a bit trickier to handle, as the bow response is better lower down the string compared to the A string. This results in a bit of awkwardness when having to change between low notes on the A and high notes on the D.
The G and C strings are similarly fantastic to the A string. Fast response and clear focused sound, even though they're not high tension like the other Larsen set.