I love that it's Earth-friendly and the hardboard covers make it easy to use without a clipboard. The ONLY reason I didn't give it a 5 is that I would have preferred a slightly heavier paper. Otherwise it's perfect the best spiral I've ever used - and I use a lot of them in my business.
The covers are a really nice and study kraftboard material and have never frayed. Wire binding is very sturdy as well. Pages have never stuck together and are a nice quality. They're a bit translucent but the light brown lines are nice looking especially with colored inks. Very smooth; I never get fibers stuck in my fountain pen nibs even the fine ones. I use Noodler's inks and they don't feather on this paper. The notebooks also tend to smell faintly sweet. A nice writing experience all around.