After spending some time with APM, we decided against it, for several reasons:
1. It's not entirely web based. In order to add a alert or a report, someone physically has to log into the server.
2. The alert manager, while more configurable than ipmonitor, is far more complicated. I could spend many many days trying to recreate what ipmonitor can throw together in a few minutes.
3. The report writer is not as good. No charts and graphs. However, APM does store in a sql database so I could write my own report tool if I had to. The comment on complexity also applies here.
4. Steeper requirements - requires a Win2k3 server and 3GB ram. I'm able to run ipmonitor on a XP machine with 2GB ram. When I look at whats running, it has 4 or 5 20+MB processes running. Why the heck does it need to be so big?
5. The installer made a mess. There are 5 or 6 install entries, and more stuff left over after it was supposedly uninstalled.
Solarwinds has decided to concentrate on the wrong product. You give up some flexibility and scalability with ipmonitor, but it's ease of use cannot be beat. Maybe APM scales better than ipmonitor, but for me its not worth what you give up. Even with a 60% discount!
It's a shame what has happened to ipmonitor. I hope they can do something soon to justify what they are charging for support every year. They seem to cycle PMs though here a lot, but that's all that seems to happen around here.