I'm getting an extensive cover-up done, hitting painful spots like my collarbone, sternum, and around my nipple. I followed the usage guidelines and applied it 45 minutes beforehand, was generous with the cream, and covered it with plastic wrap. By following the guidelines, I got around three hours of numbness from it. If you don't apply it evenly, you can tell the spots that didn't get enough, so use a lot.
I also got the spray, which works like a charm. Again, be generous and allow it to soak...