Lincare reached out to me to check my equipment for valid adjustments and mentioned that the filter should be replaced. I had to cancel our appointment because of a conflict and the staff member that took my call was so gracious and assured me that it was fine and that we could easily reschedule. We did. The young man that came to my house was very knowledgeable about the equipment and was very polite and friendly. His name is Lance and he as well as the staff member that took my call were great!