It integrates with your Windows environment seamlessly and provides a lot of visibility on your Windows environment. If you use SCCM as well, it integrates beautifully with it.
The interface doesn't provide any graphical view of your topology, you only see a bunch of alerts, monitors, etc. Humans are visual creatures and if you can see at a glance what's going on in your infrastructure, that's added value to me.
You can create dashboards to create views of your infrastructure but I feel that this should come out of the box.
It generates a lot of false positives, probably due to misconfiguration or because it doesn't have an intuitive algorithm to pinpoint the root of the problem
You need to add a lot of management packs in order to manage different devices, instead of SCOM containing these already out of the box, I'm talking about vendors such as Citrix and VMware. Even Exchange and SQL Server monitors are not configured out of the box, it requires configuration. This should come straight away configured for you, especially as SQL Server and Exchange are Microsoft products!
We've had no issues with deployment.
It lacks capabilities to properly monitor other devices or infrastructure that is not Microsoft based, stuff like Linux, UNIX, Cisco routers, switches. I mean, since it is not the core of the product, the monitoring capabilities on these devices is very basic if I compare it with CA Spectrum which it used to be a network product that evolved into something else to cover other critical and important areas like Application and Systems performance and Servers/Systems in general.
In New Zealand, it's 4/5.
Configuration of alerts and monitors is very convoluted. You need to configure four or five different places to make a monitor work.
The price is OK, and I think the licensing works the same as any other Microsoft product.
I find this product very clunky and not very intuitive to use, it took me a while to find my way around and understand where I needed to go to configure or even get a report is a bit complicated.
Your advice about using SCOM in a small environment is spot on - Dont!