We wanted to create a test suite that was easy to use, easy to create tests for, and easy to update, and we are very happy with the results so far. This is still work in progress; we estimate that about half the tests have been written to date. However, we already have good experience with the suite, and its easy modifyability helps us with constructing it.
Future work, apart from writing the remaining tests, will look at the possibilities of running the tests automatically, with minimum human intervention.