I have a Dayan that's terrible. It has this awful soft slow feeling that I don't like. I have to put it so tight it doesn't cut 45 and is super slow, and it still pops every ~100 solves.
I borrowed my friend's Lingpo and it was completely different. It has a fast, slightly crispy feeling that I love, you can loosen it as much as you want and it will never pop, the corner cutting has almost no dead zone, and it's almost uncontrollably fast.
Idk, either that's the best Lingpo ever, or maybe I'll be blown away by a good Dayan.