UPDATE 1/9: This is the first time I've actually *lowered* a review after a warranty claim. The people at Meko were very nice and sent me a second set as a warranty replacement, which arrived in a reasonable timeframe. But the second set was actually worse than the first! All of the tips were still tarnished, and the fine point on one of the pens was broken right out of the box. Also, in this set, *none* of the fine point tips worked on either my iPad or my Microsoft Surface. For what it's worth they all worked on my phone, but I have a feeling that most people buying these will be doing do for drawing or writing on a big screen. After seeing two product samples that have the same problem, I would say steer clear unless you're willing to gamble. The build quality and feel is nice, but if they don't work then what's the point? I have a cheapo rubber pen stylus that works much more dependably than these.ORIGINAL:There are great and not-so-great things about these styluses:The Good - They feel very nice and “premium” in the hand. They are milled from aluminum and have a nice heft and balance. The powder or rubber coating has a perfect texture and looks very attractive. The slide on “cap” has a smooth motion and nice detents at the top and bottom. I have only had them a couple days so I can’t say how long they’ll last but they feel well-built. As far as the function, I would only say “pretty good”. The disc tips worked well on my Android phone out of the box, and are very accurate and easy to write neatly with, but that leads me to…The Bad - Out of the box, neither stylus registered on my iPad Mini 4. At all. I honestly thought they were defective until I tried them on my phone. When they worked there I was annoyed. Then I tried replacing the tip with one of the spares, and it started working very well. All in all, only 3 out of the 6 disc tips in the package work on my iPad. This could be because of the glass screen protector on my iPad that isn’t on my phone, but I have a cheapo dollar store rubber stylus that works flawlessly with it. Then we come to the other end of the 2-in-1 stylus, the “fiber” nub end. A similar problem, it works with a light touch on my Android phone (with no screen protector), but on the iPad I have to press down with about the pressure you’d use on a pencil eraser to get it to register. This is fairly annoying, but the worst part is…The Ugly - The fiber nub tips were really ugly out of the box. They looked nothing like the shiny silver in the stock photos, they were dark and blotchy. Another reviewer assumed they had received used styluses, but I could tell mine were new, just… ugly. I had a hunch though. The conductive fabric that coats the tip is impregnated with silver, and the silver had tarnished. So I used the old chemical recipe to remove silver tarnish: I unscrewed the fiber tips from the pens, pulled off the rubber part (the tip is just conductive rubber wrapped in conductive fabric which is held elastically onto a brass screw), loosely wrapped them in aluminum foil, and boiled them in water with salt and baking soda. They still don’t look like the picture, but they are significantly shinier and work a little better (tarnished silver isn’t very conductive.) I still have to apply more pressure for the nub end to register than I would like. So if you buy this, you may receive tarnished nub tips.A couple neutral notes before the conclusion: the disc end is not like the Adonit discs that snap onto a ball joint. These “ball joints” are a just a part of the metal shaft that the disc can pivot on. The disc is attached via a fused conductive rubber disc that extends through the shaft, so the disc is a little “springy”. The nub end is two pieces, and it is possible to pull the rubber part out of the end of the stylus leaving the brass part behind. I doubt this will happen in practice, but it is possible. Also, the nub has an air gap between the rubber part and the end of the brass screw, so it’s pretty springy.All in all I’m satisfied. The disc end is very accurate, I’m able to hand write notes much more neatly than my old stylus. They were on sale for around $8 when I bought them, which at $4 apiece is significantly cheaper than an Adonit disc stylus, which only has the disc end. I am disappointed that I had to fiddle with them to get them to work out of the box, that the nub tips were tarnished, and that the sensitivity on the nub end is pretty low compared to a cheaper rubber stylus. I reached out to MekoTech about my issues and will update my review with any resolution that occurs.