We've had occasional connectivity issues with cloud resources and build failure due to its own internal system setup and environment. That costs us credits. Support engineers do not thoroughly read and understand issues when emailing them. They reply to me with a totally different context about the problem. Just yesterday, my web applications failed to 'yarn build' after I downgraded the resource class from extr-large to large. I contacted support and got no reply.

Billing is a mess. There is duplicate information in the bill downloaded from their website and when I asked for a consolidated bill, they just answered that they didn't have it. 

There is no transparency on how many billed minutes and credits I spent each day both on their website and the monthly bill which makes it difficult to understand when the monthly bill contains many refill item charges. 

It is difficult or impossible to track usage and burndown of my subscription and to gain total outstanding refill amounts on a daily basis. Their website doesn't provide sufficient information on credits allocated/calculated for my extra-large resource class.

The solution’s pricing could be better. 

In future releases, it may provide integration with Grafana or any tool for visualization.

There needs to be some improvement in the user interface of CircleCI.

Integration with Microsoft Azure is one area for improvement. Azure is growing in its user base, and supports various cloud infrastructure components such as Service Fabric, App Service, etc. Some of Azure’s deployment models (like Kudu) require a steep learning curve, but if CircleCI would come up with such features (deployment to App Service) out of the box, it would be amazing.

1. The feature of building CD pipeline as Jenkins: I confirmed with circleCI, this is in their to-do list

2. customized view of the pipeline and builds.

3. different triggers for the build, not only trigger by the github updates

4. If they can provide more examples in the documents? But I can find the examples in the discussion board anyway.