I like that it can monitor our servers in real time, so we know exactly what's going down with them when they do go wrong or are having issues! It also allows us to see historical data of all sorts for each server which helps me make better decisions about how much capacity should be added/removed from different systems at any given point (it makes sense now!).
The UI could definitely use some work - but this isn't really anything new as far as software goes these days since everyone has their own way doing things anyway :) We're using RAPIDSPIKE across multiple sites within Azure Cloud Services / VMs hosted by Microsoft where one site will have more resources than another depending upon usage patterns etc., allowing users who need less resource availability access via API keys rather then needing dedicated instances just because there needs may change over short periods without warning sometimes.