I ran a small web service in the video game industry for several years, and CloudFlare was essential to our survival, as the DDoS attacks would repeat every few weeks, and at times last 6 to 12 hours at a time. CloudFlare simply ate that up, and our customers were not impacted. Today, at a different company, different industry, we use CloudFlare for similar needs, but within physical area security networks. It's essential.