I was suspicious about how long the polish would stay on without chipping so I decided to document it. Overall, the polish is similar to having cement on your nails and feels very strong. Here is the progress (nail color is "Linkin Park After Dark" and I used the PSA Essentials Stamps for documenting):
I was really impressed with how these held up. They took a good beating during Thanksgiving and with some yardwork. Definitely recommend trying it out for yourself! Only downsides - your nails grow out fairly quickly in 2 weeks and you have to go back to the nail salon to get the polish removed.