Personally I would be very cautious of too much humidity, I think 60% is too much in my opinion. I use Prococo because I need a lot of bedding for all my racks and need something economical. I prefer a humidity to where the bottom layer of the coconut husk is damp and the top is dry.
In my ARS racks in a dry climate the top layer dries out fast, and the condensation on the walls of the tubs are gone in a day. I do mist every day but it dries out fast on top, if the bottom layers dry out I mix the substrate by hand while misting to get the bottom layer damp. Some big breeders don't even monitor their humidity and keep things as dry as possible until just before a shed to prevent respiratory infections. From what I've seen just about any of these coconut husk type bedding are ideal. But I do find that some products mold, probably from contaminants in the mix.
i have not tried this product but would like to at some point just for comparison.