The thing I hate about reviews, they are typically written by customers who didn't read or research the product to begin with. So let me help you make this decision.I've used these books for over ten years back when Brigade Quartermasters was printed on the back as the military supplier.**Important**You cannot use gel pens. Now say it with me " I will not use gel pens or highly liquid inks on this paper to include highlighters, fountain pens, water colors, and acrylic paint ". There we go, got that out of our system now. Common sense kicks in right about now as it's a waterproof paper, so if you're upset about that, that's a you problem and not a product defect. Pencils are my go-to writing instrument; however, the paper is treated and you'll see noticable erase marks. Sharpie works well but will bleed through slightly sand the poster must be dry. Actually, it's more so a noticable color differential, if you passed basic science class you'll understand the difference between black and white and thus why you can see sharpie on the backside. I've never had it completely bleed through from taking a quick note. However, if you're leaving the sharpie on it long enough to bleed through, again that's a problem with you and not the product.DO NOT write on this paper while diving. I say that but I guarantee somebody will write a complaint about it not having an IP rating. Babies, paper, and comms typically don't fair well underwater. It's not my area of expertise so ask a diver. A real one and not a Navy Seal.The notebooks were originally issued to me in the Marines, and was treated as an essential piece of my uniform. I drew up battle plans for years on these. Back when I turned the battlefield into my own lead infused chaotic artistic interpretation of Starry Night. Ten years later the paper is still intact and no fading or discoloration on a notebook I found recently.The Cover displays useful conversion for maps, measurements, and linear (see pictures). The back cover also gives you a ruler up to 4 1/4" inches and 11cm.These books are in every trauma and boo boo first aid kit I own. They are stored in every toolbox, glove compartment, emergency kit, camping gear, and next to my toilet when I brilliant idea comes to me during my morning glory. I was the officiant at my ex wife's wedding and wrote the speech in the shower the morning of.At the end of the day it's a pad of paper. You're buying it for it's durability in all weather climates. If the Amphibious Apocalyptic dealers of death we call Marines use them around the world in every clime or place, I'm sure you're "to-do" list will be ok.In conclusion, buy the notepad and if you regret your purchase, you're probably somebody that's irrationally difficult to please and found it necessary to express their dislike via a review because that's what difficult and unhappy people do. It's a notepad much like a baby, don't submerge it and expect it to work like advertised. Use the writing instruments instructed by the manufacturer, and use the thing in-between your ears. You're welcome!