Perfect Formula Nail Essentials Collection - Keratin Nail Treatment for Stronger Nails - 4 Piece Manicure Set with Nail Strengthener - Ideal for Brittle Nails, Home Salon Care & Professional Nail Protection

I'd read a lot about these polishes and was grateful they came in these trial sizes. The product is amazing and really works. My nails are strong and don't split at a certain length anymore. The reason for only 4 stars is that the Pink polish gets thick and goopy at half a bottle. If read that it happens so I would make sure I always tightened the top after using but it doesn't matter. The others bottles are fine. I also used it about twice a week so it's not like it was sitting around. But definitely a great product and I actually just bought the larger size of the Pink color. Hopefully the thickness doesn't happen with that size. If you're on the fence, go for it you won't regret it.