The directions say to apply one coat to each nail and let it dry. Then after a few minutes put another coat on and immediately hold the small magnet, which comes attached to the top of the package, over the nail for about 10-20 seconds. The longer that you hold the magnet over your nail the darker and more defined the waves will be. I love this product, the only drawback is that it does take a while to do your nails with this polish. It is time consuming to go back with multiple coats and holding the magnet over each individual nail for up to 30 seconds at a time. It also takes a long amount of time for the polish to fully dry, at least 10-15 minutes until it has completely hardened. This is definitely not for those of you who love to quickly paint your nails and be done.
Over all I would give this a product 3/5. The concept and colors are great, but it does take a long time to actually use the polish and have it turn out nicely.