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In this last year that we have been with Guillermo, we have gotten to know him a little better, and it seems to me that he is not only a good person, but also someone who really feels his profession. He likes to help and he likes people to learn with him. I like that he makes the classes adapt to us, and also, he asks us what we like to do in class. He is very well understood and I truly believe that I have improved my english with the help of his classes.

Gillermo is a great teacher.
He makes our classes really good time while we learn,making it entertaining.
He focuses on our needs when teaching and reinforces what we need, making easier to use it at work and memorize it.
I would recomemend him without hesitation.

Guillermo is a person with a very good sense of humor and makes his classes entertaining and motivating.

In particular, he has helped me to improve in very specific areas that I needed in my job and as a result, I am now able to communicate with clients fluently and confidently.

In particular, this was my goal when I started the classes and I am very happy with the result.

I recommend him as a teacher!

By far the best English teacher I have ever had (without exaggeration). He makes you feel comfortable with his great professionalism and sense of humor.
He has lived in England and the United States for many years and has extensive experience as a teacher and especially with companies. This is evident in all the resources he uses in his classes and in his ability to adapt to each student.
Thanks to his persistence and great patience (and my efforts, of course! ), I would say that my level has improved remarkably, especially in pronunciation, which is so difficult...

Desde hace varios meses Guillermo me está impartiendo clases de inglés para mejorar la fluidez y pronunciación de mi inglés.
Sus clases no solo son amenas y dinámicas, sino que también están específicamente adaptadas a mis necesidades profesionales, ya sea para reuniones, presentaciones, conversaciones o redacciones que me toca realizar en mi desempeño laboral.
Sus estudios y los años vividos tanto en EEUU como en Inglaterra avalan su nivel de inglés y además, el hecho de que imparte clases a profesionales de distintos sectores enriquece sus aportaciones con ejemplos actuales y de mucho interés.
Destacaría su profesionalismo, dedicación y compromiso. Se asegura de que entienda cada concepto y está siempre dispuesto a aclarar mis dudas incluso fuera del horario de clase.
Recomendaría a Guillermo sin ninguna duda.
¡¡Gracias Guillermo y espero seguir recibiendo tus clases durante mucho tiempo!!

Guillermo is an incredible teacher/coach. His way of being makes you relax. He’s lived in the UK and the USA for a long time, he has lots of business experience and life experience, and a really good perspecive on both of those cultures and the differences with Spanish culture. Teaching, if you don’t understand a concept, he will always find another way to explain it to you. He’s really good at reinforcing what you learn, not just telling you once. He comes back to make sure it sticks in your memory. The custom materials he prepares are awesome. Professional, friendly, persistent. Like having a friend to guide you.

Gilen is an excellent communicator, extremely knowledgeable, and he is very clear, patient and tenacious explaining things. He is very fun to be around, he has a great sense of humor that really makes our conversations light and enjoyable. I recommend him strongly as a communicator and teacher of language!