I use it for my Pi based solar production and house monitoring and like it. It was the first time i've ever used it. I found it fit perfect for this project. I was surprised when I tried to use it for literally anything other than raw linear data input it was completely useless. Neat product, but not sure why it gets so much attention given how it really one does one very very specific task... I guess it looks neat...
Actually, this greatly comes down to the datasource. Each exposes different analytical functionality at the database level. Combined with the templating and variable functionality, you can do a ton of excellent analysis on all kinds of metrics.
