API Here's the online docs There also manuals that you can buy and sample reports available. Response time How fast is the response, well that depends. This is a volunteer forum so sometimes its fast and sometimes you might never get a response period. If you want a guaranteed response you could always get the licensed version of Jasper Reports. Ease of use For your use case it's probably no more complicated then what you’re currently doing. Updates Jasper has regular updates. Usually they are pretty good about building in some backward compatibility. I never had any problem moving reports between versions.