Overall a good experience, it is a solid product, with good support. The new licensing format has put it out of reach for more than basic use.
The help from the support was amazing and fast when we had a question.
Alerting via Slack works great for our team. Overall a great tool for monitoring complex web applications.
Nothing really comes to mind as a negative when it comes to Plumbr.
We had issues with an overloaded application which caused disruption to business services. The crashes were very frequent and had a big impact on our reputation.