Ultrasonic productions is not only professional but Arturo, the owner, is very hardworking…read more For work, we needed to record a couple of demos and Arturo took the time to explain to us in detail the different tools they were using and how the recording was going to work (before he started charging us for the hour). I went with a copywriter who had A LOT of experience going into top sound studios in Europe so she was running the session and although she did not speak Spanish, Arturo was very patient and respectful of the time. When our guy in the booth would mess up or want to start from the top Arturo made sure it happened. He also, would be proactive and stop the guy if he heard something he knew wasn't going to come out right. A week later we received our audio file and were very happy with it. There were some minor changes we needed to make such as music and sound effects and Arturo was great about editing it and getting it back quickly. Overall, a good experience with a great sound professional and studio. Tip: Call Arturo before hand and get all the logistics worked out first so he knows exactly what you are expecting out of the session. Since each hour costs about 25 mil (although cheaper than a sound studio in the US), it is still important to not waist time.