Kemp LoadMaster

When it comes to load balancing the requests, Kemp is doing an excellent job. The intrusion prevention and web application firewall is another excellent feature. If your organization needs all these great features but in cost crunch, Kemp is the solution.
If tech support is more important, Kemp is the solution. I have had fewer conversations with their tech support, and they impress me every time.
If you need more detailed live reporting then Kemp is lagging there. If you are using virtual server then the restore is easy except the license is locked with MAC so changing licenses might be an additional headache. I just tried to transfer my VM from one host to another host, but it locked it due to MAC restriction. I called support, installed new VM and restored my configuration. I was up in no time.

The installation was straight forward. Once i installed it, their technical support team helped me with configuration.

We have 24/7 support with Kemp. I have used them on numerous occasion (day time, night time, weekend etc.) and they are always available and very knowledgeable. They are always willing to help with patience.

It serves the purpose for what we bought it for. We also got few more additional feature than what we had before.

Very well suited for On-Premises MS Exchange environments where uptime/availability and performance are crucial. Environments where high volume email, including mass-mailings are needed. Companies with limited or generalist Infrastructure team members with fundamental knowledge of the protocols, that need to be able to quickly implement and leverage an enterprise-class mail load balancing/routing solution without needing hours of learning curve time or training to do so effectively.
-UPDATED APRIL 2021-
Well suited for Highly Available DNS (Windows/AD) provisioning, which we plan to use very soon in the future.

I think for the types of Kemp products we've utilized, and the roles we needed them for, the configurability is just right. I don't recall ever wishing that a particular Virtual Service had any missing features or settings available that it didn't already have. One minor thing it could do better is update/make notification settings easier to find and use more modern methods besides just email alerting (SMS?).

While needing to contact support for their product is rare, when we do it is always a pleasurable experience. Their Techs are USA-based, practical, very knowledgeable, detailed & responsive. The last time we needed their support the root cause actually ended up being unrelated to the Kemp LoadMaster itself, but an obscured downstream failure of our own equipment. The technician helped flush-out this issue via verbose logs and packet captures, explained why the Kemp was behaving as it was designed in this situation, suggested remediation tactics and still followed-up on his promise to keep the case open until we had implemented a solution to the downstream issue, and fully tested it with him afterward.

The full picture of easy, intelligent UI usability, robust performance & availability, simple service provisioning, detailed and useful performance metrics and logging, upgrade/maintenance ease, monitoring, online articles & active communities and excellent paid-support earn this product high marks. The simple fact that the uptime of this system is over 99.999% through its 7+ year deployment is testament to the product quality.
-UPDATED APRIL 2021-
On the latest upgrade project from LM2400 to X3s I was able to get acquainted and leverage the X3's Console menu, including a factory reset as well as the CLI. Both performed relatively well with the exception of a 'stuck' HA configuration that was only remedied by cold booting (warm boot was not fixing it). Kemp Support, as expected, quickly harvested the logs after we worked through the issue so they could analyze the Root Cause in their labs since it was recognized as a possible emerging bug on their end.

To put it bluntly, their support is perfect. Willingness to help, aggressiveness of problem resolution, attention to customer concerns, flexibility in staffing off-hours for maintenances, clear/frequent & timely communications and follow-ups, highly trained Engineers, forthright admission of product issues or limits, adherence to HA best-practices... the list goes on and on. Their support never fails to impress.

I would gladly recommend Kemp LoadMaster if you need an easy-to-use application to balance several sites and more.

The Kemp LoadMaster is easy to use and easy to configure. There are so many built in templates where you can complete a setup in a matter of a few minutes.

The support engineers are top notch - very responsive and helpful.