Unfortunately my set of SNS extensions weren’t great for two reasons: 1) the nails are bumpy in places - only two layers of the product were used which meant there wasn’t enough product on the nail to smooth them over thoroughly with a file; 2) the lengths were uneven on one hand compared to the other - this meant I needed to file them myself when I got home.
The set look okay now, but for a £35 treatment, I would expect better.