Just had Dave and Andrzej help fix some programming issues I had from a prior dealer that didn't know what they were doing. It was quick, efficient and reasonable priced. Ive been using C4 in my homes from the early years and experience has been rough with too many dealers not educated on C4. They nailed it and the programming from Oz was cool as it was done in the morning when I woke up. Highly recommend and will keep using them as I finish out my system now I got some one that knows what to do.