Review (5/5): Take the time and read the instructions on the page!!!
One thing to note about my testing of this product: I did it on nail tips with builder gel underneath (it is clearly stated that this product will not remove builder gel or anything else other than gel polish)
I followed the directions provided in the description. A few comments said that the instructions are not included in the packaging, and they are not, but they do include a step by step picture of how to use it in the description before you buy it and it's not hard to remember.
I will say that I had to apply the product a couple of times to get the black off BUT I feel that if I did this on my natural nails it would provide a better result. Also, I would much rather do this, than soak them off with acetone.
This product doesn't burn or leave your skin feeling dry and stripped of nourishment like acetone. You also HAVE TO BUFF AWAY THE TOP LAYER of your gel. Gel Top coat is relentless and you have to scrape it away even if you're soaking with acetone. I honestly think anyone who says it doesn't work, just didn't read the description.
Overall, while its not as immediate of a process as depicted in the advertisement, it's still a vast improvement and much quicker than soaking your gel off, and much safer than picking them off.