CND is a safe choice in terms of chemical ingredients, perhaps the safest. What I recommend is the base coat and the colors, not the top coat. It has let me down completely, especially if you change color every week.

Positives:
_Removal is super easy! It hardly damages the natural nail at all, which is rare for other brands (as long as you follow the application instructions provided by the company).
_On the natural nail, it is very lightweight and I have never experienced any discomfort.
_During curing, there is no burning sensation like, for example, with Lalloo.
_It does what it promises, meaning it applies like polish, removes in a few minutes.
_It has the right viscosity, not too runny, not too thick, so it stays where you put it.
_The color is excellent in terms of full coverage.
_It doesn’t bubble.
_It doesn’t smell at all.

Negatives:
_It has an average brush, especially for the €30 it costs, I would call it bad.
_If you buy white or milky shades, unfortunately, it has a yellow tint after curing.
_Its top coat has a medium shine and dulls easily.
_The biggest drawback is the duration of the manicure it offers, as it lasts a maximum of 7 days.
_You can’t file it after curing to clean up the edges because its composition after curing is like gel and not like powder (as with other brands), so if you file it, a whole piece will peel off.

I'm sorry, but it's better not to buy them.

No matter how I tried, they don't last. The bad thing is that I got carried away and bought twenty shades from the regular one that promises 15 days of duration. Ten times worse. Chipped, peeled, overall no durability at all.
At least try first with one color and then get more.