Review (3/5): Some are good, some aren't so much
Review for top and base coat: (Disclaimer: This product was sent to me) This product works really well! The topcoat helps to smooth out imperfections very easily. The base coat seems to perform as well as any other base coat does.
Review for Colors of 2019 set: So I was very excited when I received this set because the colors are so beautiful. But, the two shiny polishes were a bit goopy and when I was curing them, I was getting major heat spikes. I tried the set again to see what would happen, and what I found was that the plain colors (darker blue, sky blue, hot pink, and nude) worked the best. This second time I also tried to keep my coats very thin to avoid the heat spikes, which mostly worked. The only problem with this is that it takes so long to make the colors opaque.
The bottom line: the plain colors are good, the shiny are bad. And do REALLY thin layers.