- Pure play integration (ESB)
- Orchestration (BPEL)
- API Management (Rest Adapters, API manager, etc.)
We're an SI, so I can only comment on behalf of our customers. By implementing SOA, underpinned by Oracle SOA Suite, we have been able to help customers save thousands of dollars by optimizing business processes, shortening software development lifecycles by being more agile and reusing services, and APIs. Our business is able to deliver products to the market quicker and cheaper.
API Management and BPM both need work, but I believe Oracle is already working on this.
We've been using it since its inception, 10.3.x, so that's nine to 10 years.
We've had no issues with deployment.
There were no issues in v188.8.131.52, but in 12c, the very early releases were a bit unstable. However, with Oracle's new release cycles were able to release patches very quickly, and now v12.1.3.x and v12.2.1.x are very stable products.
There were issues scaling, but mainly because the customer didn't set up the product properly, and didn't do capacity planning properly. If the product is setup properly according to the right capacity design, it scales as expected.
The complexity of setup depends on the set up. For developers and/or development environments, setup is very simple. With SOA Quickstart, it only takes a few minutes to have SOA Suite and full IDE up and running. For production environments, it takes a bit longer. However, there are several ways including products that will automate full installation out-of-the-box.
Do proper capacity planning. Engage an expert in the field to assist in defining what the requirement is, what approach to follow when licensing (Oracle processors, named users, metered/unmetered if cloud), and then size to the actual needs throughout time. This approach will almost certainly result in much cheaper license costs, probably less than other competing products that have less flexibility when licensed.
We also looked at Mule ESB/CloudHub, TIBCO, and IBM. There were many reasons that we chose Oracle, including that it's a more robust and scalable product, more features, better future roadmap and product vision, better integration with Oracle Apps, and Oracle Cloud SaaS.