The very professional examiner I sat my test with, came highly recommended and he was everything he was said to be.
He suggested a lesson before the test and I agreed to this to get an idea of what the test format might be. We cut the lesson short as I was all over it, and went on to the test. With it being much simpler than I had anticipated, I had no issues.
I would expect that most if not all R/T examiners would also teach and that might be an excellent way for you to prepare for the test.