I just got into neons this summer and since this is an old cult favorite, I had to try it. To say that it is a bright neon yellow is an understatement. I can even see it in the dark! However, I don't care for the formula. It is extremely streaky even after three and four coats over white. There's another neon yellow in my collection from the discontinued Sally Girl line that is much better. Still requires white undies, as yellow neons almost always require to achieve opacity, yet it only needs two coats to even out streaks. If I bought it a few years ago when it first came out I'd probably give Glowstick a pass. But in 2017? Not so much. Neon formulas have improved over the years. That is actually why I decided to try them now. I don't regret trying this in the slightest, but it's not my fave either.