"Matias employs a comprehensive approach based upon a solid educational methodology and challenging lessons that straddle conversation, writing, and listening / reading comprehension. He is particularly strong in the last area, where, by using transcription and summarizing lessons, he forces you to evolve your understanding from words / sentences to context-informed meaning. As a logic-based learner, I have found Matias has greatly helped me advance beyond a plateau where I had been stuck for years."