I know Robert a little bit, we were on the Addictions expert panel together at the EFT Masterclass in London this autumn. I have not done any training with Robert, but am aware he is popular and has a lot of experience, though not everyone likes his style - you may find it useful to watch some of his YouTube videos to get the feel for his approach and see if it suits you.
I imagine at a masterclass, you can't really get a feel of a tool of therapy. Always best to attend the whole training.
You are right June of course there is no way to tell without doing a whole training, though I probably didn't explain myself correctly - I didn't attend a presentation by Robert but we were both sitting on the addictions panel answering the questions from the audience - apart from that I have not actually seen him in action at all; so best if you find out for yourself.