[Bamafan]

Whether an API is "good" or "bad" often is dependent on the requirements of the calling client. At the beginning of projects when client requirements are unclear, it is often hard to determine whether a supporting API/library truly meets your needs.

[ecshafer]

That is true. To move away from language like good or bad. I would say DocuSign is quite reliable, we had one outage that was their fault and we were an edge case. I would also say that their API is sufficient for 95% of use cases or more with very little work arounds. Their customer success architects or whatever they call them were also pleasant to work with and responded promptly.