I got this cube after I broke my Aochuang WRM as a replacement(its a long story). I always liked the Aochuang but I've always wished it was slightly less flexible. Especially when compared to the other Moyu WRM big cubes, (4x4 and 6x6) the 5x5 also felt pretty slow. I had heard that the Dayan Nezha was a bit like a fast and light version of the Valk 5 (aka more stable) and decided to give it a go. I got the cube today and I have to say that I am a little surprised; and I am not sure if its a good thing or a bad thing yet.
As with other Dayan Cubes, this one has a light airy feel. Out of the box, its dry as a bone and feels very sandy as a result. I had also heard that this cube was somewhat loose out of the box but in my experience its the opposite, being very tight. Most importantly, it has absolutely no reverse corner cutting. I can tell that this cube will break in nicely but I am not sure if the whole "can't reverse corner cut even a quarter of a piece thing" is a deal beaker for me. In a way this cube feels like the inverse of the gan 4x4; the inner layers feel great but the outer layers are a bit of a mess.
What mostly kills this cube for me is that I can feel the flashing on the plastic. As a flag ship cube, its just unacceptable to have this amount of flashing on the outside of the pieces. I plan to keep solving this cube for another day or two to see if it breaks in nicely but its likely that I will go back to the WRM.