You can always ask. Whether people answer is their choice. And what worth that answer might be is up to you to judge.
For example, I may say that a few hours-long seminars with Soke Grandmaster Maestro DaMan is worth a decade of training with anyone else. And, for me, it might be -- because it's the material I need or it's presented the right way for me. Somebody else may have been at the same seminar, training alongside me, and feel it was a total wast. The material didn't make sense, the presentation was lazy, and nobody worked it the way it should have been done. And that may also be totally true -- from his point of view, with his experience.
