The wheel itself is the newest, "safer" version of the wodent wheel rebranded. The thing I don't like about them is the solid track. It doesn't allow them to hang on like they do in the mesh wheels we use, it also doesn't allow pee and poo to fall through like the mesh does. I've never been a fan of the outter lid with the holes design I like the open face wheels better.
My favorite wheels are the Stealth wheels and Custom Cruisers wheels. The Stealth because they are by far the easiest to get in and out of a cage by yourself. The Cruiser because of the quality of materials, and bounce feature.
Cracked fur, her fur looks slightly cracked. But cracked fur is a cosmetic issue not a health issue, not anything to be really concerned about.