This service is very easy to use, we can easily configure our rules with this tool without any need of writing code or configuring firewall manually (as in traditional tools). Also support API gateway / server side protection as well which I like most about it. It's free but limited functionality available only through pay plan. You should try out their product if you are looking at cloud security services provider from Amazon Web Services. We were dealing with threats coming via web application attacks so i recommend them because they have best solution for that problems too. Protection against various malicious activities such as DDoS attack.