Tenable.io CS is pretty stable. I haven't seen many performance issues so far. 

It is a stable solution. The guidebooks provided are brilliant.

I rate Tenable.io Container Security's stability a seven out of ten. 

It is not much of a stable solution.

It operates in the cloud, so there are no issues, and the service is always available. It's a cloud solution, and in my experience over the last four years, Tenable has never crashed. It's consistently reliable, scoring about nine to ten in terms of availability.

The product we use in our office under different environments is highly stable.