How easy it is to pump data into InfluxDB, query it, and downsample it.
The query language is great, intuituve, and well thought out.
It is fairly easy to install, configure, and get working out of the box.
Performance. I have very little data (100k points) on an Amazon EC2 t2.medium instance (below recommendations, but I have very little data) and when I query for data it crushes the CPU. And is very slow to return results.