no huge impact [SEP] the cost was reasonable and it arrived quickly and was easy to apply however i was bummed to see no noticeable impact on the strength or thickness of my nails after using this i am an anxious nail bite er and sometimes i can go quite awhile without any issue but then bam all my nails are gone and my nail beds are bleeding its embarrassing and i generally will cover it with acrylic nails while they heal and grow out however my nail shop is not in business yet so i thought to try this when my nails are healthy i have strong clear straight nails i do not have damage due to acrylics so i had a bit of expectation that i would get closer to that with this product nope not much different from your average top coat