I started using email validation 10 months ago, I used several tools, but with this price and validation quality, I won't find better than this. The option that I liked the most is the real-time verification log option, it's very transparent I find it. I also asked the support on the chat tab 2 times, and the replies were too fast. now I'm into tier 1, I might upgrade it within the next few days or weeks, depending on my validation frequency. Is it worth it? 101%