I bet Skyline does a good job helping them keep track of all the system metrics. But, I think one thing our tool does better is periodic timeseries. That's the sweet spot of our tool, and it looks like Skyline doesn't have any special considerations for periodic timeseries (although it looks like their ensemble of algorithms is extensible).
Anyway, thanks for the link! And I hope you liked our tool!
http://codeascraft.com/2013/06/11/introducing-kale/ https://github.com/etsy/skyline https://github.com/etsy/oculus