If you are looking for a stylus to take notes or do homework with, this is it. Its exceptional build quality, sturdy design, and predictability make it the best writing and graphing stylus you can buy.
The Cosmonaut isn't based on some fancy, next gen capacitative technology; and that's a good thing. Its lack of features is actually its best feature. There's nothing to replace, no electronic pressure sensing to glitch out or distract you, just pure, stylus functionality. It's all about the writing, swiping, and tapping and really, that's all that matters. Furthermore, its simplicity also makes it durable. Take tough aluminum and wrap it in even tougher rubber. This thing is built to last. Other rubber and mesh tipped styluses I bought started cracking or otherwise failing after about a month of hard use, this stylus just refuses to quit.
I used the Cosmonaut for an entire quarter of college, which involved nightly math homework assignments, daily note taking, annotating more PDFs than I care to recall, and a whole lot of just screwing about on a tablet. I used it to write sentences and equations,to draw graphs and diagrams, and also to just navigate around the tablet interface. It excelled at all tasks. There is little to no friction with the screen surface (unlike cheaper rubber styluses) and even better, its stiffer tip makes it a lot more predictable and easy to control. Other rubber tipped styluses, even expensive ones like the Wacom Bamboo, simply compress too much when they're being used. This makes it somewhat difficult to figure out exactly where the line will show up. This is not a problem with the Cosmonaut.
There are those who will say that if you want accuracy, you should go with the Adonit Jot, and if you are a professional artist who must know *exactly* where your line is being drawn down to the last pixel, well yeah, nothing beats being able to see the line as it's being drawn. But for the rest of us, the additional hassle of having to deal with replacement disks and a noisy writing experience is simply not worth it. Besides, the Cosmonaut is pretty good at drawing too. I'm not a serious artist by any means but I do dabble in sketches from time to time and I've had no problems with the Cosmonaut's lack of transparent tip. It's simply predictable to the point where that ceases to matter.
That being said, it's not perfect. While I like the wide-bodied design, I personally think it's ergonomics would benefit from a slightly smaller diameter. This would also help with its other problem: weight. As far as I can tell, it's machined out of a solid chunk of aluminum, which is great for durability--it also gives it a satisfying heft. But you really feel that extra ounce or two after an hour straight of note-taking. Future iterations would benefit from a drilled-out aluminum core. In fact, I'm thinking about doing this myself with my friend's drill press.
All in all, the Cosmonaut is as good a stylus as you're going to find on today's market. Its bare-bones design might turn some people off because there are more feature-rich styluses available at cheaper prices, but really, this is the one to get. Its predictability alone puts it head and shoulders above the competition and its durability only elevates it further.
4.5/5 stars (this system doesn't support half stars unfortunately)
Pros:
+Predictable writing and drawing
+Super durable design
+Little to no screen friction
+Simple, effective design that gets out of the way
Cons:
-It's a bit fatter and heavier than I'd like in a writing implement