Barcelona Capital, Esplugues de Llobregat, Hospitalet de Llobregat, Sant Adrià de Besòs, Cornellà de Llobregat, Badalona, Santa Coloma de GramenetGuillermo was a phenomenal teacher. Not only was he always friendly, but he was also attentive to what I needed and flexible enough to modulate the course around that. I now have a level I hardly could have reached without his precious help.
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