It's very easy to setup and use, there are so many features it can be tricky to know which ones you need. I'm using it for load balancing our web servers, we don't have any issues in that department, however as it does not offer any WAF/DDoS protection we do need to look at other solutions. We can see where users are coming from and if they are being spoofed, I also like having the ability to block URLs. We used their services in building our new data center facility. They were flexible in helping us define what we need when it came time to design/build our systems infrastructure. Our requirements included both server hardware as well as networking gear (including VMWare virtualization). Their team was able to help ensure that they recommended only high end products which would be compatible with each other without requiring major changes later down stream - so everything worked together!