I use these to write to-do lists and to sketch out problems and ideas, and they do the job perfectly. I even bring them to and from the office in my bag and the writing stays clean despite the journey.
I love this product - so much so that I went.... WHAT?!? The first time I used them.
Swipies have changed the way I take notes and start projects. I can take as many notes as I need before harvesting what's important (and erasing the rest!). I also love jumping in on brainstorming with a Swipie --- so much less pressure than pen and paper. I initially rated as 3/5 because of damage during shipping, but the company got in touch and made it right! Wow. High quality product and a company to match.