I've been fond of these neon markers ever since I got them in a set of three random scrawler boxes (remember when they sold random boxes?), they're somewhat hard to find locally for me, so of course I was happy when I saw this mini kit contained them.
They're easy to use, very juicy, and last longer than one would expect based on their size. And of course, if you use a blacklight on them, they'll shine beautifully- but they'll pop and stand out even under normal lighting.
The minikit also comes with a handy black paint marker, and a chiseled black fine liner. Both are pretty useful to have in general, and will contrast nicely with the neon markers if you wish to use them together.