In K2 Cloud you do not have access to the SmartObject tester, so the only way to test SmartObjects is via the Management interface (find the SMO and execute a method).

Quite often you need to copy values from the results to use in another SmartObject method (especially with REST serialized objects). You cannot easily copy values (you can open the browser developer tools but this is cumbersome and not user friendly). It would be nice to be able to either copy or export the values (to Excel for example).