I’m doing an experiment right now. I bought several different types of strings and I’m seeing which ones hold string tension the longest and which ones can throw slacks the easiest. I didn’t know about cloud string when I made my purchase.
So far, it looks like YoYoStringLab strings, either the Ammo or the Venom, are the best ones (for me). I also tried standard Kitty String, Kitty 1.5, Twisted Stringz - Type C, and a friend gave me a Kevlar string.
For me, I’m liking the standard Ammo string for slacks a bit better than the Venom. But that may be a reflection of my new to intermediate skill level. If I was a better yoyoer I may notice more of a difference. But the Kitty strings certainly didn’t seem to hold their string tension very well at all. In fact, that’s what led me to want to try other strings.
I hope that helps.