I have start to use this service 5 days ago when I realized that the situation of cyber attacks that my server received every day was going out of the control.
So I have desided to try BitNinja for fix this bad situation.
Before use this service, I recived on websites of my customers about 200 spam comments every day. about 1000 attempts of login every day. So this situation became every day more worse.
Now with BitNinja I recive not more of 3 or 4 spam comments per day, for now 0 (this is a fantastic result) attempts of login to wordpress or other types of customers' websites.
This service protect my server, and I have had mode to see this from logs files, against brute force attacks, ssh attacks, port scanning and more other events.
With bitninja I continue to use my external firewall, one internal network firewall and fail2ban for keep my security level always elevate.
One big difference from this service and the other ones that I have tried is that this service don't use a lot of resources, keep the server always speed.
It is very simple to monitor all situation in a unified dashboard. Review collected by and hosted on G2.com.