It's number one, as it does all that you need for monitoring, highly recommended. This is because Application Manager is super easy to use. It was exceptional for me because it an all-in-one solution.
The best option that is has is the option that allows you to enable monitoring RAID storage on a local ESXi server.
I have set it to monitor all the services on physical and virtual servers, our websites ,our databases, and report via SMS. I used its web-link monitor, services monitor (Linux, Windows. ESXi, etc.) and so many other options.
I found Application Manager better than other products, including Solarwinds, because there are so manys option in Application Manager that makes it unique, such as supporting all servers, networks, cloud systems etc.
More modem support for SMS feature.