Here are some my company has noted: 

- Gives plants a path to leverage historical data

- HTML5 Interface

-  Low commissioning time

- Extremely scalable

- Floating licenses for visualization and excel add-in

- Focus on being “Open” on the incoming AND outgoing sides

          - Free Read API

Class leading performance

          - “Mastered the art of being able to compress, store and retrieve just massive, massive amounts of data using a minimal amount of disk IO and storage space.”

          - Scalable (though they can handle 2-3 million tags before a second server is recommended)

          - Write Speed – Over 1.5 M writes/sec

          - Read Speed – Over 2.5 M reads/sec

- Reporting tool is very easy and intuitive

- Good business model and costs 

- Contextualization tools

          - Tag aliasing

          - Asset modeling

          - Calculation server

          - Event monitoring

https://www.youtube.com/watch?v=wboQZBWrxvQ (short version)

https://www.youtube.com/watch?v=EgMX8zxGu6I  (long version)