I like Cristobal, he’s pretty quick to respond, knowledgeable and reasonable, he speaks English as well but keep in mind, for many of us, face to to face communication in another language is more productive than over the phone. I usually send him a whatsapp, he responds the same day and sets up a time to come. His number on whatsapp is (or drop the +52) and that’s his cell number.
+52 33 3477 8690