DENISE
Thatcher Mills was amazing
Thatcher Mills was amazing. He answered my many emails with patience and professionalism. I bought the Devilbiss ultra quiet 525DS-Q ... I wanted my own machine as a back up to the Devilbiss 525 that I currently have. The 525-DSQ is the updated 525. It is the same machine essentially just updated technology and components. They made it quieter by about 10-15 decibels is the biggest difference. I can tell you that 10 to 15 decibles makes a much quieter machine. The original 525 was not terribly loud and it is a workhorse of a machine. I am thrilled with my purchase. I researched before I bought this machine. I also did get a great price on this one. Thank you
Response from Oxygen Concentrator StoreJun 25, 2025
Thank you, Denise! We’re so glad to hear that Thatcher provided patient, professional support and helped you feel confident in your purchase. It’s great to know the 525DS-Q is living up to your expectations—especially with the quieter operation and reliable performance you were looking for. We appreciate the time you took to research and share your experience. If you ever need anything else, feel free to reach out—we’re here to help!