Right after unpacking the highlighters, I had a bit of a scare!
Three of the pens had white nibs and the rest had extra faded ink! And no matter how much I shake them and try to write with them they did not apply any color. At first I thought they were dried out but the nib was wet with ink only it was transparent. Then I remembered the fact that frixion ink fades with heat and can be restored when subjected to extreme low heat (As per the description above).
So, I left the pens in the freezer, took them out after about 10 minutes, left them to thaw then tried them again and they worked perfectly fine!
So, definitely be wary of that if you place your order during the summer ;)
After solving the problem, the highlighters are very delightful change from the usual strong colors and they erase very well. The colors are still too faded for my liking but definitely usable. Overall, a nice product.

I always had problems skimming my text books after highlighting and with how light the colors are it's easy, even without erasing anything.
The colors are by no means dim though. They are colorful and attention getting but not bright and blinding. I love these highlighters and won't buy any hang else. :)

These are by far the best highlighters I've ever owned. I use highlighters for a lot of planning and outlining, so I like to have a good selection of colors, and one of the biggest problems I have with most, is that once you get past yellow, the other colors can get really dark and hard to read through. These soft colors are a godsend, for real -- they're so subtle and so light, but it's still enough color to make it pop on the page.

And the erasers actually work! I was a little skeptical about them at first, and they weren't at all a major selling point for me, but of course, I had to try them when they got here. And they erase the highlighter ink really easily! The only thing is that you have to wait for the ink to completely dry, or else the eraser might smudge it up a little.

I had an initial moment of worry when I first used one of the highlighters, because the point felt dry and stiff, but that was just because it was brand new, of course -- they work like a dream now. Really pleased with this purchase.

These are really good highlighters, but, with one downside. If there are any classes you have where you have to highlight more than once a week, you will be dissapointed, as the highlighters you use for those classes will run out of ink really quickly.

Initially I loved the pastel colors of these but I found that each time I repurchase I like these less. Yes, the colors are very mild and light but they dry out incredibly fast.