First of all, of course I love this book because it's designed to sustain and not waste tons of paper. However, there are a few things about it that must be noted. I got this notebook because I'm in grad school, work full time, and do work study. Plus I play a lot of games so I need to take a lot of coordinated notes.I have reviewed everything I tried separately, which I'll paste at the very end of this.TL;DR in the middle.I noticed one reviewer from several years ago test out all of the pen colors and post them. I wanted to do the same because I was hoping maybe the formula had changed, but this is not the case. The photo that says "phone version" I took with my phone, the other photo is the one that was scanned from the Rocketbook, using the pens, with their app.Suffice to say, do NOT waste your money on the highlighters, and the felt/fine tip pens only really work for darker colors. Thus, it's best to get the clicker pens and use those.As others have said, get the pen station. It is CRUCIAL since this can only be used with one type of pen. I had an old pencil case and eyeglass cleaner bottle, so clean them out really well and put the cloth in the front compartment and the extra pens and spray bottle in the big compartment and just carry it around in my back pack.DO NOT ERASE. Just because you can with these pens, doesn't mean you should. Another mentions this as well, but if you erase on the rocketbook pages it messes up the composition somehow and it's much more difficult to write over where you just erased. Also, if you erase sometimes the shavings (?) get stuck on the page and if you wipe them off they smear and then you have to try to gently scrape them off without ruining the page.Lastly, set up with the app was extremely easy and pretty straightforward. It works exactly as it says and I love that I can get a text version and a PDF scan so when my messing handwrite translates incorrectly, I can just check the image on the fly. I appreciate the double pound sign/hashtag for automatic titles as well. You can customize how your file names are saved, if scans are grouped or not, and more. The only thing I'll say is confusing about this, is the pictures they have make it look like you just push on the symbol for your desired destination, but as far as I can tell, that's not how it works because you assign them and then select in the app after scanning?It does come with a section to write down what you assigned to what, which is also erasable! (So don't write too hard if you mess up and accidentally ruin part of one line like I did before realizing it worked the same way).Overall, I LOVE this concept and this book and it's also cool there are so many colors. My partner is actually jealous and immediately wanted one for himself. I already got him one, everything he needs, but he doesn't know that yet! It's a surprise. I use it constantly, in classes and meetings and just notes to myself. I think I'll get my best friend one too since we have a penchant for gifting each other pretty notebooks.TL;DR: Only use the Click pen, do NOT get the highlighters. Absolutely get the pen station and a small glasses or pencil case for a spray bottle & the cloth. App is very user friendly.Reviews on all of the various pens (below):HighlightersThese are great highlighters for normal paper, however, if you want to use them with a reusable notebook like rocketbook, they aren't very good.They will smear your ink ans erase parts of what you've written in one to two swipes. They also show up quite poorly, if at all, when scanned and converted to the app. I tested several types of pens on that notebook, and showed the results from the scan and photo with my phone ("phone version") to show this.Fine pensI tested these pens with a few other types, pictured on the left side where it says "fine" next to them.On normal paper, or to the naked eye, they're wonderful and the colors are pretty nice for inexpensive fine tip pens.If you want to use them with a reusable notebook, though, the colors don't translate through when you scan the pages and you lose a lot of the color overall.So, they're great for normal paper but not for reusable, erasable types of paper.ClickI tested these with several types of pens, these ones have "click" or a C next to them.Out of all of them, these were the best. They write the most smoothly, and I love that the clicker is the little clip.On normal paper ("phone version") they write beautifully and are lovely shades.If you want them for reusable paper or notebooks, though, they're still the best I've found so far but they're not the greatest. When they scan, they don't translate accurately and most of the shades all look black or much darker than they are.They erase well either way, though.Pen holderThis is particularly nice for reusable notebooks or binders. Especially if you can only use specific pens with them, or have one you really don't want to lose.It's also nice because this way you can choose to attach it where and how you want. The only thing I don't like is that you can only carry one pen this way. I'd like to be able to have two attached, but I suppose with this you could just attach multiple!