We are a small "SAAS/ASP" company (with very limited technical staff) which depends heavily upon the availability of our servers and back-end networking equipment. That said, we had been looking for, and evaluating network monitoring applications for the last 6 months. After evaluating Orion, it only took about two hours to make a unanimous decision!
Orion has everything we were looking for in one package, with a customizable web interface for quick "at a glance" views, e-mail threshold notifications, custom snmp polling, and network uptime statistics. We've had Orion for less than 3 months, and it has already paid for itself.
Thanks SolarWinds!