The formula on these was very good. Some of the older linear holographic polishes had huge problems with streaking and bald spots when not used with an Aqua Base-type basecoat, but these do not have that problem at all. They apply evenly without bald spots, streaks, running, pooling, excessively thin formula or sheerness, or really any noticeable problem. Some colors apply easier than others, but overall I'm pleased with the application. I'm also happy about how long they wear; the past few times I've worn these has been without any base or topcoat and each one lasted almost a week without chipping. Usually the stronger the holo, the faster it chips, but I didn't have that problem with these. Fast dry time, as expected. Zero complaints in the formula department. Opaque at two coats, which is what I'm wearing here.
Topcoat does seem to dull the holographic look a little, but it gradually returns to full strength the longer you wear it. I don't wear base coat or top coat with these, though- they don't seem to need it for wear, dry time or shine.
One thing I like about some of these is the intensity of the base color. Angel Kiss and Miss Bliss are two good examples of a colorful holo that's not overly faded or silvery-looking. Not all the shades have saturated, colorful bases, but they all still have a very strong linear holographic effect.
You may have noticed that there's a black holo in this collection. It's good. It's better than Revvvolution. I don't like it quite as much as my beloved OPI My Private Jet, but it is one of the better black holographic polishes I've come across. Good formula, reasonably and affordably priced and easy to obtain. I'd pick it up if you are a fan of black holos.
The price of these varies depending on where you get them from. I paid $8 each for mine at 8ty8beauty, but I just saw them on clearance at Meijer for $3.50 a bottle. Much cheaper than pretty much any other full-sized holo polish on the market right now.