I like that YesStyle offers a lot of products from Asia wherein the products might be harder to find in other countries. Although the shipping does take an awful long time (still waiting on my order from 3/10), at least you only pay $2.99 for standard shipping, which is cheap enough for me.
One thing that kind of bugs me is that some products might be a bit overpriced such as an Etude House product that's normally around 7~8USD can be around 10~17USD on YesStyle. I realized that after ordering some Etude House products, YesStyle has to order the products first and then they ship the products to you, as the products are not already in their inventory. Not sure if this is true for all items listed on their website though.